NEXV3 SIR Sect L_Att L04_Amend 2.pdf

693KA8-23-R-00005

SIR Att L04 - NEXV3 Analyses Requirements

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

13 3.2.1.1.d

The VHF radio equipment, when configured for 8.33 kHz channel spacing, shall13 operate in compliance with ETSI specification EN-300-6761 (excluding ETSI sections 4.3 and 5).

A AETS Non-High N/A EN-300-676

17 3.2.1.3.a

The radio modulation method shall17 be A3E DSB-AM in accordance with FCC regulations in 47 CFR, Part 2, Frequency Allocations and Radio Treaty Matters; General Rules and Regulations, October 2015; Part 87, Aviation Services, October 2015; and the NTIA Manual of Regulations and Procedures for Federal Radio Frequency Management , September 2017.

A AMMD Non-High N/A

FCC CFR,

NTIA

18 3.2.1.4.a The radio equipment shall18 be software/firmware (SWFW) upgradeable.

A ASPC Non-High N/A

20 3.2.1.4.c

The radio equipment, as separate entities, shall20 use no more than 50 percent of their non-volatile memory (as defined in section 6.14, Non-Volatile Memory) for storage under worst-case conditions (e.g., when a radio has SWFW active (in-use) and other SWFW version(s) is/are loaded).

A ASPC Non-High N/A

21 3.2.1.4.d

The radio equipment, as separate entities, shall21 use no more than 50 percent of their random-access memory (RAM), under worst-case conditions (e.g., when a radio has the SWFW active (in-use) and other SWFW version(s) is/are loaded).

A ASPC Non-High N/A

22 3.2.1.4.e

The peak utilization of the available resources of each processor within receivers and transmitters, inclusive of Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs), shall22 not exceed 50% when placed under its maximum usage1.

A ASPC Non-High N/A

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

L04-1

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

50 3.2.2.1.1.k

The receiver internal audio delay shall50 not exceed 20 ms as measured between the envelope of the modulated RF signal applied to the antenna input and the demodulated audio available at the analog audio outputs and the remote IP interface via VoIP.

A and T

AIAD

RASQ

Non-High N/A

53 3.2.2.1.4.a The selectivity of the receiver shall53 conform to Table 3‑3 with respect to the tuned channel center frequency across the entire frequency band.

A ARSL Non-High N/A

9 3.2.2.1.5.a The VHF receiver should9 not have image frequencies within the 112.000 MHz to 150.000 MHz band. A ARIR N/A High

10 3.2.2.1.5.b The UHF receiver should10 not have image frequencies within the 225.000 MHz to 399.975 MHz frequency band. A ARIR N/A High

54 3.2.2.1.5.c

The sensitivity requirements of section 3.2.2.1.2 shall54 not be degraded by more than 3 dB in the presence of an undesired signal as specified in Table 3‑4 for the relevant receiver type.

A ARIR Non-High N/A

62 3.2.2.1.7.a

The frequency tolerance of the receiver reference frequency shall62 be within ±0.0001 percent (±1 ppm) of its reference value for a period of one year following alignment over the full frequency range specified in section 3.2.1.2, and the temperature range specified in section

3.4.3.2 (Operating Conditions).

A ALOF Non-High N/A

63 3.2.2.1.7.b

The reference used to generate the receiver operating frequency shall63 have a tuning adjustment to compensate for aging during the minimum useful service life1 of the equipment.

A ALOF Non-High N/A

L04-2

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

65 3.2.2.1.7.d

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the external reference frequency monitor port shall65 have an impedance of 50 ohms.

A ALOF

Not Separately

Evaluated (Shall 62)

N/A

66 3.2.2.1.7.e

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the external reference frequency monitor port shall66 have a reference signal level greater than or equal to −20 dBm.

A ALOF

Not Separately

Evaluated (Shall 62)

N/A

67 3.2.2.1.7.f

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the receiver shall67 provide an output of the reference frequency signal for measurement, testing and alignment.

A ALOF

Not Separately

Evaluated (Shall 62)

N/A

68 3.2.2.1.7.g

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the reference signal monitor port shall68 be sufficiently isolated such that a short circuit applied from the monitor port to ground does not degrade the radio performance as specified in section 3.2.2.1, Receiver Requirements.

A ALOF

Not Separately

Evaluated (Shall 62)

N/A

125 3.2.2.2.1.i

The transmitter internal audio delay shall125 not exceed 10 ms as measured between the analog audio inputs or the remote IP interface via VoIP and the envelope of the modulated RF signal at the antenna output port.1,2

A and T

TAKY

AIAD

Non-High N/A

L04-3

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

148 3.2.2.2.7.a The transmitter shall148 have the capability to operate at a 100 percent duty cycle at its maximum rated output power.

A AXDC High N/A

166 3.2.2.2.12.1 b Both voltage and current key signal interfaces shall166 incorporate debounce circuitry that minimizes the generation of false key events.

A ATKT Non-High N/A

47 3.2.2.2.12.3 b The debounce circuit delay should47 not be less than 10 ms.

A ATKT N/A High

175 3.2.2.2.13 a

The transmitter frequency tolerance shall175 be within ±1.0 ppm for any one year period following alignment over the full frequency range specified in section 3.2.1.2 and the temperature range specified in section 3.4.3.2.

A ALOF Non-High N/A

176 3.2.2.2.13 b

The reference used to derive the transmitter operating frequency shall176 have a tuning adjustment adequate to compensate for aging during the minimum useful service life of the equipment.

A ALOF Non-High N/A

188 3.2.2.2.14.k

The radio shall188 be equipped with external removable jumpers, or equivalent RF switches2, capable of operational use to provide connectivity between the following connectors:

1. The RF and ATR2 connectors,

2. The RF to FILTER IN connectors,

3. The FILTER OUT to ATR2 connectors, and

4. The receiver’s FILTER OUT to RF IN connector

A AATR Non-High N/A

57 3.2.3.1.1.1.4.a The MDTS should57 have an NSS supervision function1.

A ANSS N/A Non-High

L04-4

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

244 3.2.3.1.1.1.4.b

If an NSS is implemented, functions and performance of network components (i.e., NEXCOM V3 radio equipment) shall244 not be influenced by the presence or absence of the NSS. A ANSS

Not Separately Evaluated

(Should 57) N/A

245 3.2.3.1.1.1.4.c

If an NSS is implemented, the introduction and use of NSS shall245 not to interfere with other possible management, configuration and supervision systems that vendors may have introduced in support of their equipment.

A ANSS

Not Separately

Evaluated (Should 57)

N/A

246 3.2.3.1.1.1.4.d

If an NSS is implemented, the NSS supervisory function shall246 have enough capacity to guarantee data exchange and storage.

A ANSS

Not Separately

Evaluated (Should 57)

N/A

247 3.2.3.1.1.1.4.e

If an NSS is implemented, the NSS supervisory function shall247 support redundancy, in order to guarantee a high level of availability and avoid any data loss.

A ANSS

Not Separately

Evaluated (Should 57)

N/A

248 3.2.3.1.1.1.4.f

If an NSS is implemented, the protocols used for supervision function purposes for all components and objects supervised by the NSS shall248 be standard protocol SNMPv3, as defined by RFC 3411.

A ANSS

Not Separately

Evaluated (Should 57)

N/A IETF SNMPv3

249 3.2.3.1.1.1.4.g

If an NSS is implemented, radios shall249 be accessible by a remote Maintenance Data Terminal (MDT) placed in the network utilizing the NSS supervision function.

A ANSS

Not Separately

Evaluated (Should 57)

N/A

L04-5

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

58 3.2.3.1.1.1.4.h

The radio should58, at a minimum, permit a NSS supervisory function to query and set all FAA Monitoring and Control Parameters, as defined in Table 3‑16 of this PD, and all monitoring and control parameters as defined in the ED-137C/5 ANNEX A3 MIB.

A ANSS N/A

Not Separately

Evaluated (Should 57)

ED-137C/5

59 3.2.3.1.1.1.4.i

The NSS supervisory function should59 use the FAA Desired ED-137C/5 ANNEX A3 MIB monitoring and control parameter details, as defined in Table 3‑17 of this PD, when interfacing to the radio.

A ANSS N/A

Not Separately

Evaluated (Should 57)

ED-137C/5

60 3.2.3.1.1.1.4.j

The radio should60, permit a NSS supervisory function to query and set the FAA Desired Monitoring and Control Parameters, as defined in Table 3‑18 of this PD.

A ANSS N/A

Not Separately

Evaluated (Should 57)

61 3.2.3.1.1.1.4.k The radio should61 permit a NSS supervisory function to receive a radio state-change event message and indicate that a Factory Reset was invoked1.

A ANSS N/A

Not Separately

Evaluated (Should 57)

250 3.2.3.1.1.1.4.l

If implemented, the NSS shall250 be capable of monitoring the operational status of the supervised network components in near real time.

A ANSS

Not Separately

Evaluated (Should 57)

N/A

251 3.2.3.1.1.1.4.1.a

If an NSS is implemented, upon alarm or event occurrence, the NSS shall261 provide information about its nature and, whenever possible, the localization of the alarm/event source, by giving the user appropriate details on “where” a given alarm or event has occurred.

A ANSS

Not Separately

Evaluated (Should 57)

L04-6

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

62 3.2.3.1.1.1.4.1.b The NSS should62 have the capability of utilizing an NTP clock over the network for use when time stamping alarm and event occurrences.

A ANSS N/A

Not Separately

Evaluated (Should 57)

63 3.2.3.1.1.1.4.2.a

Alarms and events at an NSS should63 be categorized according to their severity level as defined by ITU-T M.3100. These levels are as follows:

1) Critical,

2) Major,

3) Minor,

4) Warning, and

5) Cleared.

A ANSS N/A

Not Separately

Evaluated (Should 57)

ITU-T M.3100

252 3.2.3.1.1.1.4.2.b

If an NSS is implemented, alarms and events at the NSS shall252 be user defined allowing the user to define which alarms and events are configured in each severity level1,2.

A ANSS

Not Separately Evaluated

(Should 57) N/A

280 3.2.4.3.a The IP interface(s) shall280 support Internet Protocol version 4 (IPv4) as described in Internet Engineering Task Force (IETF) publication RFC-791.

A AIPS Non-High N/A IETF IPv4

281 3.2.4.3.b The IP interface(s) shall281 support IPv6 as described in IETF publication RFC-2460.

A AIPS Non-High N/A IETF IPv6

282 3.2.4.3.c The IP interface(s) data link layer shall282 be Ethernet as described in Institute of Electrical and Electronics Engineers (IEEE) standard 802.3-2022.

A AIPS Non-High N/A IEEE/ANSI

283 3.2.4.3.d The IP interface(s) physical layer shall283 be 100BASE-TX as described in IEEE standard 802.3-2022.

A AIPS Non-High N/A IEEE/ANSI

88 3.2.4.3.f The remote IP interface(s) should88 support VoIP as described in ED-137C/4 specifications.

A AIPR N/A Non-High ED-137C/4

L04-7

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

285 3.2.4.3.g

If the remote IP interface(s) support ED-137C/4, the recording client within the radio shall285 support at least the “RTSP and RTP interleaved over TCP” as defined in ED- 137C/4 section 2.5.1.

A AIPR

Not Separately

Evaluated (Should 88)

N/A ED-137C/4

286 3.2.4.3.h

If the remote IP interface(s) support ED-137C/4, the recording client within the radio shall286 support at least “Recording Mode 2” as defined in ED-137C/4 section 2.3.

A AIPR

Not Separately

Evaluated (Should 88)

N/A ED-137C/4

287 3.2.4.3.i The IP interface(s) shall287 support ED-137C/5 Supervision specifications (excluding paragraphs 8.2 and 8.3). A AIPM Non-High N/A ED-137C/5

288 3.2.4.3.j The IP interface(s) shall288 be software upgradeable in order to support future FAA approved protocols and standards.

A AIPU Non-High N/A

IEEE/ANSI &

IETF

89 3.2.4.3.m

The IP interface should89 support “all optional SDP attributes” as defined by ED-137C/1 with the exception of “disconnection mode” and “RX-multicast-addr”.

A AIPE N/A Non-High ED-137C/1

308 3.3.2.1.a

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the reference frequency monitor connector shall308 be located on the front panel of the receiver.

A ALOF

Not Separately

Evaluated (Shall 62)

N/A

309 3.3.2.1.b

If a measurement of the receiver frequency reference is required to align the radio to meet the tolerance defined in 3.2.2.1.7.a, the connector shall309 be a female BNC with shielded termination.

A ALOF

Not Separately

Evaluated (Shall 62)

L04-8

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

310 3.4.1.1.a Workmanship shall310 be in accordance with MIL-HDBK- 454C, Guideline 9, requirements.

A AWRK Non-High N/A

MIL-HDBK-

454C

327 3.4.1.7.a The radio equipment shall327 not be damaged by over-temperature/over-heat conditions. See section 3.4.3.2. A AENV Non-High N/A

328 3.4.1.7.b The thermal circuit shall328 not cause a reduction in operation (power output) when operating within the duty cycle and environmental conditions specified.

A AENV Non-High N/A

329 3.4.1.8.a

The radio equipment shall329 meet the shock requirements listed in MIL-STD-810H; Method 516.8; Procedure II (Transportation, On Road) and Procedure VI (Bench Handling).

A AS&V Non-High N/A

MIL-STD-

810H

330 3.4.1.8.b The radio equipment shall330 meet the vibration requirements listed in MIL-STD-810H, Method 514.8, Procedure I (General Vibration).

A AS&V Non-High N/A

MIL-STD-

810H

331 3.4.1.9.a The radio grounding requirements shall331 be as specified in FAA-STD-019E, sections 4.1.2, 4.3.4, 4.3.5, and their associated subsections.

A AGBS Non-High N/A 019E

332 3.4.1.9.b The radio bonding requirements shall332 be as specified in FAA-STD-019E, section 4.1.1, and its associated Subsections.

A AGBS Non-High N/A 019E

333 3.4.1.9.c The radio shielding protection requirements shall333 be as specified in FAA-STD-019E, section 4.1.2, 4.3.6, and their associated subsections.

A AGBS Non-High N/A 019E

336 3.4.1.11.a All parts and materials used in the radio equipment shall336 be new.

A AMPP Non-High N/A

L04-9

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

337 3.4.1.11.b The radio components shall337 be equal to or better than those components meeting the applicable EIA standards and suitable for the purpose intended.

A AMPP Non-High N/A EIA

338 3.4.1.11.c All parts used in radio equipment shall338 be operated within their electrical ratings and the environmental requirements of this specification.

A AMPP Non-High N/A

339 3.4.1.11.1.a Ferrous materials, if used in construction of the radio equipment, shall339 be corrosion-resisting types. A AMPP Non-High N/A

340 3.4.1.11.2.a Arc-resistant materials shall340 be used for insulation of electrical power circuits where arcing is likely to occur. A AMPP Non-High N/A

341 3.4.1.11.3.a Selection and use of dissimilar metal combinations shall341 be in accordance with FAA-G-2100J, section 3.3.1.2. A AMPP Non-High N/A

2100J, MIL-

STD-889D

342 3.4.1.11.4.a Fibrous material shall342 not be used. A AMPP Non-High N/A

343 3.4.1.11.5.a Flammable materials shall343 not be used as per FAA-G- 2100J, section 3.3.1.2.2.

A AMPP Non-High N/A 2100J

344 3.4.1.12.a An equipment malfunction shall344 in no way contribute to the destruction of the equipment or any part of its environment.

A ASAF Non-High N/A

345 3.4.1.12.b Safety shall345 conform to the requirements of FAA-G- 2100J, section 3.3.5, and associated subsections.

A ASAF Non-High N/A 2100J, various

348 3.4.1.13.a The radio equipment shall348 conform to the applicable criteria contained in HF-STD-001B.

A AHPE Non-High N/A HF-STD-001B

L04-10

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

358 3.4.1.16.3.a

The adjustment range of the radio operation and maintenance controls shall358 be constructed to preclude damage to the equipment or its subassemblies when adjusted to the limits of the control travel.

A AARG Non-High N/A

359 3.4.1.16.3.b The range of control shall359 be constructed to reduce the sensitivity and criticality of the adjustment task to the maximum extent possible.

A AARG Non-High N/A

373 3.4.1.16.6.e Incandescent lamp bulbs shall373 not be used for visual indications.

A AMPP Non-High N/A

93 3.4.1.16.6.f The front panel indicators should93 be light-emitting diode (LED) type.

A AMPP N/A Non-High

383 3.4.1.17.a

Each radio shall383 have a permanent, non-changeable and unique identification (ID) number that is both marked on the front and rear (back) panel and accessible via the monitoring and control functions.

A ARID Non-High N/A

389 3.4.2.1.g

The radio equipment, when operating on AC voltage only, shall389 automatically resume normal operation after being subjected to power interruptions, degradations and/or outages in accordance with FAA-G-2100J, section 3.1.1.6 a.2.a and Appendix A (ITI (CBEMA) Curve).

A APWR Non-High N/A 2100J

390 3.4.2.1.h

The radio equipment, when operating on DC voltage only, shall390 automatically resume normal operation after being subjected to power interruptions, degradations, and/or outages.

A APWR Non-High N/A

L04-11

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

400 3.4.2.4.1.a

Current overload protection for the radio equipment shall400 be provided by fuses, circuit breakers, or other protective devices for primary input AC and DC circuits.

A ACOP Non-High N/A

401 3.4.2.4.1.b Overcurrent devices shall401 have a minimum of 10,000 AIC (ampere interrupting capacity) rating.

A ACOP Non-High N/A

402 3.4.2.4.1.c Overcurrent devices shall402 be protected from damage due to a loss of power (AC or DC).

A ACOP Non-High N/A

403 3.4.2.4.1.d Overcurrent protective devices shall403 detect fault currents and provide fault isolation.

A ACOP Non-High N/A

404 3.4.2.4.1.e Series combination system overcurrent protection shall404 not be permitted.

A ACOP Non-High N/A

405 3.4.2.4.2.a

All radio components, circuits, and assemblies that are susceptible to damage by electrostatic discharge (ESD) shall405 be protected specified in FAA-STD-019E. A AESD Non-High N/A 019E

406 3.4.2.4.2.b All radio designs shall406 withstand static discharges as specified in FAA-G-2100J, section 3.2.6, without resultant unit, assembly, or component failures.

A AESD Non-High N/A 2100J

407 3.4.2.4.3.a

The radio equipment shall407 contain protective devices in the audio circuits that conform to IEEE/ANSI Standards C62.36-2016, Standard Test Methods for Surge Protectors and Protective Circuits Used in Information and Communications Technology (ICT) Circuits, and Smart Grid Data Circuits.

A AESD Non-High N/A IEEE/ANSI

L04-12

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

408 3.4.2.4.3.b

The radio equipment shall408 contain protective devices in the AC power circuits that conform to IEEE/ANSI Standards C62.41.2-2002, Reference Table 1, and verified by testing in accordance with IEEE C62.45-2002.

A AESD Non-High N/A IEEE/ANSI

411 3.4.3.a

The radio equipment shall411 be constructed of material that withstand any combination of environmental and service conditions cited in this PD without causing damage or degradation of performance below the requirements specified in this PD.

A AENV Non-High N/A

412 3.4.3.1.a The radio equipment shall412 be constructed of material compliant with the thermal design requirements of FAA-G- 2100J, section 3.1.2.5.

A AENV Non-High N/A 2100J

413 3.4.3.2.a The radio equipment shall413 be able to operate in a facility under the operating conditions specified in Table 3‑23. A AENV Non-High N/A

414 3.4.3.3.a The radio equipment shall414 meet the requirements for non-operating conditions as set forth in Table 3‑24. A AENV Non-High N/A

416 3.4.4.b

Electromagnetic emission and susceptibility of the radio equipment shall416 not exceed the GROUND, NAVY limits of MIL-STD-461G requirements: CE-102, CS-101, CS-114, CS 115, CS-116, RE-102, and RS-103.

A AEMC Non-High N/A

MIL-STD-

461G

418 3.5.1.1.a The predicted1 Mean Time Between Failures (MTBF) for the radio equipment shall418 not be less than 50,000 hours. A AMTB Non-High N/A

L04-13

April 11, 2023

Shall # Should #

FAA-E-37021

Paragraph Requirement

OCT

Method

Test Case(s)

Shall Prioritization

Level

Should Prioritization

Level

Standard

(STD)

NEXCOM V3 VHF/UHF Radio - Analyses Requirements

100 3.5.1.1.b The predicted1 Mean Time Between Failures (MTBF) for the radio equipment should100 not be less than 100,000 hours.

A AMTB N/A Non-High

419 3.5.2.a The radio equipment shall419 provide parameter adjustments for routine maintenance.

A AMTB Non-High N/A

421 3.5.2.c Site repair1 shall421 be limited to the exchange of a radio in order to restore air-ground communication services. A AMTB Non-High N/A

422 3.5.2.d

The radio equipment maintenance procedures shall422 not require any additional test equipment that is not already in the FAA inventory as defined in Table 3-25.

A AMTB Non-High N/A

424 3.5.2.2.a

The radio equipment shall424 be configured so that periodic maintenance can be performed without disrupting other radios that are operating with the exception of a radio connected to the same ATR switch.

A AMTB Non-High N/A

425 3.5.2.2.b Periodic maintenance intervals shall425 be equal to or greater than one year.

A AMTB Non-High N/A

426 3.5.3.a The radio equipment shall426 have a minimum useful service life of 20 years.

A AMTB Non-High N/A

L04-14