Service difficulty report · Modulating Valve · Boeing 737890
FAA SDR system
- Difficulty date
- July 9, 2022
- Submitted
- July 11, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35685
- Aircraft time
- 51,770 hours, 15,372 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 1870
- Condition
- Failed
- Location
- Right Ecs Bay
- Part time
- 93,996 hours, 42,260 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 ILLUMINATED, CLEARS WITH MASTER CAUTION. GROUNDED - YES. CONFIRMED FAULT, R/H PACK TEMP CONTROL BITE PROCEDURE REF B737-800 FIM 21-62 TASK 801 SHOWS HARD FAIL "FLIGHT DECK TCV" (V143). REMOVED & REPLACED SAME REF B737-800 AMM 21-61-21, LK CK & GROUND FUNCTIONAL CK NML REF AMM 21-61-00-700-806-002. PULLED & RESET 1 TOTAL C/B.