Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- April 13, 2019
- Submitted
- April 15, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35201
- Aircraft time
- 32,425 hours, 9,454 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 1454
- Condition
- Inoperative
- Location
- Lt A/C Pack
- Part time
- 81,870 hours, 42,636 cycles
- Stage of operation
- NR
- How discovered
- 9
- 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
CONT CAB ZONE TEMP LIGHT ILLUMINATES ON MASTER CAUTION RECALL. PERFORMED QRH PROCEDURE AND OPS ARE NORMAL. GROUNDED - YES. CONFIRMED FAULT, #2 PACK-ZONE TEMP CONTROLLER BITE TEST FAILS FLIGHT DECK TCV (V143). #1 PACK-ZONE TEMP CONTROLLER SHOWS NO FAULTS. REMOVED & REPLACED FLIGHT DECK TCV REF B737-800 AMM 21-61-21, LK CK & OPS CK NML REF AMM 21-61-00-700-806-002.