Questions and Answers.pdf
PDF 82 KB Posted
- Attached to
- Antenna Preventative Maintenance
- Solicitation number
- FA486126Q0028
About this file
This is a Questions and Answers (QnA) document for federal contract opportunity FA486126Q0028, addressing 99 CS LMR Antenna Preventative Maintenance at Nellis Air Force Base and Creech Air Force Base.
The Government maintains tower infrastructure across three sites: Nellis Main Site with two self-supporting towers (185 feet and 150 feet) containing a combined 8 antennas, a 125-foot tower at Building 10309 with 1 antenna, and a 150-foot tower at Creech Building 1052 with 4 antennas. Equipment at Nellis consists of Andrews RF connectors, 1 5/8" Heliax cable, and Sinclair omnidirectional 6 dB gain antennas, while Creech uses Andrews RF connectors with Heliax cable and antennas of unknown brand. Contractors must submit sweep test results in PDF format with photographs of defects where possible, following industry standard criteria per Motorola R56. The Government will provide site escorts and coordinate all equipment shutdowns, with Nellis Tower 2 available for initial testing without interruption. Replacement parts including antennas, connectors, and coaxial cable are contractor-procured under separate Contract Line Items per the Performance Work Statement. All preventive maintenance must be performed by tower climbing personnel, with contractors responsible for inspecting available climb equipment; safety climbs are present at Nellis Tower 1, Tower 2, Creech, and the Nellis area II tower lacks safety climb equipment. Government personnel will ensure all transmitters are deenergized prior to climbing activities. The Government will provide 2023 and 2024 baseline reports to the successful contractor. Creech AFB access requires contractors to have no pending litigation, with a 99 CS/SCOT member serving as escort and sponsor. All travel between Nellis AFB and Creech AFB must be included in the Firm Fixed Price, and any authorized repair work requires prior funding approval and fair and reasonable pricing determination before contract modification.
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- Questions and Answers (QnA) -
FA486126Q0028 - 99 CS LMR Antenna Preventative Maintenance
1. Tower Inventory
Can the Government provide the tower heights, tower types (guyed, self-supporting, monopole), and current antenna inventory for each of the three tower sites?
Main Site (Nellis):
Self supporting 185’ Tower 1: 1 RX antenna, 3 TX antennas
Self supporting 150’ Tower 2: 1 RX antenna, 3 TX antennas
Self supporting 125’ Bldg 10309 (Nellis) 1 Antenna
Self supporting 150’ Creech Bldg 1052 2 RX antennas, 2 TX antennas
2. Equipment Manufacturer Information
Can the Government provide the manufacturer and model numbers of the antennas, feedlines, connectors, and associated RF equipment included in this maintenance effort?
Andrews RF connectors, 1 5/8” Heliax cable, Sinclair omnidirectional 6 dB gain antennas at Nellis.
Creech antennas brand unknown, Andrews RF connectors with Heliax cable
3. Sweep Testing Requirements
Is the contractor required to submit full electronic sweep files (e.g., Anritsu Site Master .dat/.msa files), or are PDF reports acceptable?
A PDF file of the results and site conditions is acceptable. Pictures of defects when possible preferred.
4. Sweep Test Parameters
Are there specific pass/fail criteria for Return Loss, VSWR, Distance-to-Fault (DTF), or insertion loss that the Government requires?
Industry standard (Motorola R56)
5. Tower Access
Will Government personnel provide access to all communication sites, compounds, and equipment shelters, or will contractor personnel require escorts?
Yes, there will be an escort to all tower locations.
6. Creech AFB Access
Are there any additional security or escort requirements unique to Creech AFB that should be considered when scheduling preventive maintenance?
Contractors cannot have any pending litigation as Security Forces will deny entry. A member of 99 CS/SCOT will accompany the contractor and sponsor/escort the contractors on base.
7. Existing Documentation
Will previous PMI reports, antenna drawings, or baseline sweep reports be made available to the successful contractor?
A copy of the 2023 & 2024 reports can be made available.
8. Equipment Shutdowns
Will Government personnel perform any required radio system shutdowns, or is the contractor expected to coordinate and execute outages?
Government personnel will coordinate with the contractor and perform equipment shutdown. Nellis tower 2 is a backup tower with spare antennas and can be tested first without any interruption. Tower 1 TX antennas will be powered down one by one and moved over to tower 2.
Creech will be able to do 1 RX 1 TX at a time then swap power to the spare RX and TX.
9. Replacement Parts
If deficiencies are identified during inspections, will replacement antennas, connectors, coaxial cable, and related materials be Government-furnished, or should the contractor procure these items under separate CLINs?
Contractor procured, please reference Attachment 1 – PWS for more details.
10. Emergency Service Calls
Approximately how many emergency or unscheduled service calls have occurred annually over the past three years?
None.
11. Site Conditions
Are there any known access restrictions, environmental concerns, or construction activities at any of the tower sites that could impact scheduling?
There are no know site restrictions currently. A member of 99 CS/SCOT will be onsite with the contractor during the PMI to provide access to the tower site.
12. Quality Control Plan
Does the Government have a preferred format or template for the Quality Control Plan, or is a contractor-developed plan acceptable provided it addresses all solicitation requirements?
A Contractor developed plan is acceptable provided it address all requirements.
13. Contract Manager
May the Contract Manager also serve as the Lead Technician, provided all response times and contract requirements are met?
Yes
14. Climbing Requirements
Is all preventive maintenance expected to be performed by tower climbing personnel, or are any Government-owned climbing aids, permanent ladders, or access systems available?
PMI is expected to be completed by tower climbing personnel; The contractor should perform a safety inspection on the tower safety climb equipment prior to attempting to climb. Tower 1 at Nellis has a permanent ladder with a safety climb attached. Tower 2 has step bolts/climbing pegs with a safety climb. Nellis area II tower has step bolts/climbing pegs but NO safety climb. Creech has step bolts/climbing pegs with a safety climb. 99CS/ SCOT does not have a climbing program nor the equipment necessary.
15. RF Safety
Will the Government ensure transmitters are reduced in power or placed in a safe condition during tower climbs, or is the contractor responsible for coordinating RF exposure mitigation?
Yes government personnel will coordinate with the contractor to ensure all TX antennas are deenergized prior to the PMI.
16. Observed Defect Reports
Is there a Government-provided template for the Observed Defects Report, or may the contractor use its standard reporting format?
The contractor may use its standard reporting format.
17. Optional Repair Work
If repair work is authorized following inspections, will it be issued through individual task authorizations, modifications, or separate contract actions?
Funding must be approved prior to any repairs, and the pricing must be determined fair a reasonable before a modification can be executed to account for additional work.
18. Travel
Should all travel between Nellis AFB and Creech AFB be included within the Firm Fixed Price, or is there a separate reimbursement mechanism?
Included in firm fixed price.
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