Pages from 03-110FS-7_2023-05-11_08-37-16.pdf
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- Attached to
- Pre-Check Test Stand
- Solicitation number
- M6700123Q1154
- Issued by
-
United States Marine Corps
About this file
This document provides testing procedures and troubleshooting guidance for an anti-ice air valve to be used on aircraft. It outlines leakage, opening and closing, and post-test procedures to test the valve's functionality and ensure it meets requirements. Tests are to be conducted using a test setup with controlled air pressure and flow measurements. The valve must seal properly and open and close within specified parameters in response to changes in pressure and energization of the solenoid. Troubleshooting advice is provided to address potential issues such as improper stroke adjustment, damaged seals or parts, or a valve becoming stuck closed.
The related federal contract opportunity is a solicitation from the United States Marine Corps seeking offers for a pre-check test stand. No other details are provided on requirements, pricing, response dates or awardees.
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Text version
NAVAIR 03-110FS-7 004 00
T.O. 15E2-2-59-3 find total stroke. Total stroke of pilot valve (Figure 3, view B, dimension D) shall be 0.010 – 0.012 inch less than dimension C. If stroke is not within limits, turn valve pilot clockwise to reduce stroke, counterclockwise to increase stroke. One turn equals approximately 0.025 inch. Repeat steps p. and q. until stroke is within limits.
r. Ensure P/N and S/N are vibro peened on bottom of solenoid.
Asbestos 2
Handling Long Strands of Safety Wire
• Cut ends of safety wire are sharp and can easily puncture skin.
• Long strands of safety wire are difficult to control and present a danger to face and eyes.
• Use care when handling pieces of safety wire.
s. After stroke adjustment is completed, install pressure plug (5, Figure 1) (or machine plug (6) with gasket (7)) and torque to 40 – 50 inlb. Safety wire (0.032 inch dia.) plug (6) to inlet boss.
t. Install protective caps (28, 30) and protective plug (29).
15. TESTING.
16. TEST SETUP AND EQUIPMENT. The following equipment is required for testing the anti-ice air valve:
a. A source of clean, filtered shop air, capable of supplying a controlled air pressure between 8 and 190 psig at ambient temperature.
b. A 28 Vdc power supply.
c. A test setup is required as shown in Figure 4.
Pressure gage shall be accurate within ±1 percent of reading. Air flow measurements shall be accurate within ±5 percent of reading.
17. LEAKAGE TEST.
a. Connect anti-ice air valve as shown in Figure 5.
b. Close valve V2 and open valve V1 (Figure 4).
Energize anti-ice air valve and set inlet air pressure at 125 psig. Internal air leakage shall not exceed 3.6 cfm.
c. Connect anti-ice air valve as shown in Figure 6.
d. Close valve V2 and open valve V1 (Figure 4).
Ensure valve is de-energized and set inlet air pressure at 125 psig. No external leakage is permitted.
18. OPENING AND CLOSING TEST.
a. Connect anti-ice air valve as shown in Figure 6.
Figure 4. Valve Setup
WARNING
Figure 5. Test Setup, Anti-Ice Air Valve
Figure 6. Test Setup, Anti-Ice Air Valve
b. Close valve V2 and open valve V1 (Figure 4).
Energize anti-ice air valve and apply air at 190 psig ±5 psig to valve inlet. De-energize valve; valve shall open. Energize valve; valve shall close. De-energize valve; valve shall open. Pressure sensing gage shall read minimum of 125 psig and shall not fluctuate more than ±5 psig.
c. Ensure valve V2 is fully closed and energize anti-ice air valve. Reduce inlet air pressure to zero.
Valve shall be fully closed at all pressures of 8 psig and above.
d. De-energize anti-ice air valve and increase inlet air pressure to 13 psig. Valve shall be fully open.
e. If valve passes, repeat test with inlet air set at 800°F ±20°F; allow 2 minutes to pass between valve actuations.
19. POST TEST PROCEDURES.
a. Disconnect anti-ice air valve from test equipment.
b. Install protective caps (28, 30, Figure 1) and protective plug (29).
20. TROUBLESHOOTING.
a. If valve does not meet the requirements of all tests, refer to Table 3 for troubleshooting guidance.
b. If additional troubleshooting guidance is needed, contact engineering for assistance.
Table 3. Anti-Ice Air Valve Troubleshooting
Trouble Probable Cause Remedy
Internal leakage exceeds limits. Stroke (D, Figure 3) measurements incorrect.
Recheck/adjust stroke (D).
Damaged piston (21, Figure 1), piston seat (15), or valve pilot (22) sealing surfaces.
Replace damaged parts.
External leakage exceeds limits. Connecting nut (26) not torqued correctly.
Ensure nut (26) is torqued to 155 – 165 inlb.
Seal (12) not seated correctly. Ensure seal (12) is seated correctly and not damaged. Replace seal (12), if necessary.
Valve closes on itself. Retainer (13) not torqued correctly. Ensure retainer (13) is torqued to 140 – 160 inlb.
Valve stuck closed. Bent pilot guide (14). Replace pilot guide (14).
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