What was found
APU PNEUMATIC PRESSURE FLUCTUATES INTERMITTENTLY DURING PACK OPERATION. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW B767 AMM 49-53-01. NO PART INFO AVAILABLE AT THIS TIME.
- Difficulty date
- August 26, 2023
- Submitted
- August 31, 2023
- Operation
- Air carrier
- Aircraft
- N321CM
- Make and model
- Boeing 767323
- Aircraft serial
- 29431
- Aircraft time
- 87,268 hours, 14,944 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.