What was found
CONT CABIN 'ZONE TEMP' LIGHT ILLUMINATES DURING MASTER CAUTION RECALL. GROUNDED-YES. REMOVED & REPLACED CONT CABIN TRIM AIR MODULATING VALVE, REF B737-900 AMM 21-61-21. OPERATIONS CHECK GOOD. NO LEAKS NOTED.
- Difficulty date
- November 22, 2020
- Submitted
- December 1, 2020
- Operation
- Air carrier
- Aircraft
- N464AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40714
- Aircraft time
- 25,311 hours, 7,965 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 21359
- Condition
- Inoperative
- Location
- Lt A/C Pack
- Part time
- 22,933 hours, 6,967 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.