Service difficulty report · Modulating Valve · Boeing 737890
FAA SDR system
- Difficulty date
- December 20, 2020
- Submitted
- December 23, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 39044
- Aircraft time
- 43,832 hours, 13,213 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 18518
- Condition
- Failed
- Location
- Rt A/C Pack
- Part time
- 27,818 hours, 8,745 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK LIGHT ON MASTER CAUTION RECALL EXTINGUISHED ON RESET. GROUNDED-YES. PERFORMED BITE CHECK, REF B737-800 FIM 21-62 TASK 801/802, TRIM VALVE LIGHT ILLUMINATED. REMOVED & REPLACED ZONE TRIM VALVE OPERATIONS CHECK GOOD, REF B737-800 AMM 21-61-21.