- Difficulty date
- August 8, 2017
- Submitted
- August 10, 2017
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44105
- Aircraft time
- 8,356 hours, 2,795 cycles
- Part
- Actuator
- Part number
- 676000141
- Part serial
- 676000145128
- Condition
- Failed
- Location
- Lt Ram Air Inlet
- Part time
- 6,243 hours, 2,137 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
LEFT PACK LIGHT ILLUMINATES WITH MASTER CAUTION RECALL AND EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. ACFT GROUNDED. CONFIRMED FAULT, LT PACK/ZONE TEMP CONTROLLER BITE TEST IAW AMM 21-61-00. FAILED LT RAM AIR INLET ACTUATOR. REMOVED & REPLACED THE ACTUATOR IAW AMM 21-51-21. GROUND FUNCTIONAL CHECKED NORMAL.