Service difficulty report · Modulating Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- January 30, 2021
- Submitted
- February 1, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36354
- Aircraft time
- 26,851 hours, 8,554 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 2502
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 40,733 hours, 17,338 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED B737-900 FIM 21-62 TASK 842 "FLIGHT DECK TRIM VALVE" FAULT ACTIVE. REMOVED AND REPLACED FLIGHT DECK TRIM VALVE REF B737-900 AMM 21-61-21. PERFORMED BITE TEST, NO DEFECTS NOTED. LEAK CHECK GOOD.