What was found
LEFT AND PACK LIGHT ILLUMINATED ON RECALL. ACFT GROUNDED. REMOVED & REPLACED LEFT AFT TRIM VALVE IAW AMM 21-51-10 AND AMM 21-51-00-700-803. PZTC BITE TEST CHECKED GOOD. ALL TEST SHOWED GREEN LIGHT. OPS NORMAL.
- Difficulty date
- August 9, 2017
- Submitted
- August 14, 2017
- Operation
- Air carrier
- Aircraft
- N459AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36352
- Aircraft time
- 13,787 hours, 4,563 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 17320
- Condition
- Faulted
- Location
- Lt A/C Pack
- Part time
- 20,667 hours, 6,337 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.