Service difficulty report · Modulating Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- January 28, 2021
- Submitted
- January 30, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41703
- Aircraft time
- 23,970 hours, 7,649 cycles
- Part
- Modulating Valve
- Part number
- 3989083
- Part serial
- 5674
- Condition
- Inoperative
- Location
- Left Ecs Bay
- Part time
- 66,485 hours, 24,093 cycles
- Stage of operation
- TX
- How discovered
- V
- 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
AFTER ENGINE START DURING MASTER CAUTION RECALL CONT CAB ZONE TEMP LIGHT ILLUMINATED, PER QRH LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED-YES. REMOVED AND REPLACED FLIGHT DECK ZONE MODULATING VALVE, REF B737-900 AMM 21-61-21. OPERATIONS AND LEAK CHECKED GOOD. CLEARS MEL 21-21G SEAMC JEREMY NOTIFIED PLACARD REMOVED.