What was found
AIR TURN BACK, AFTER TAKEOFF UNABLE TO MAINTAIN CABIN PRESSURE DURING CLIMB. NR 1 PACK ON MEL AND NR 3 PACK FAILED DURING CLIMB. NR 2 PACK WAS UNABLE TO MAINTAIN PRESSURE. REPLACED NR 3 ACM, PERFORMED OPS CHECK, ALL NORMAL.
- Difficulty date
- June 7, 2009
- Submitted
- June 8, 2009
- Operation
- Air carrier
- Aircraft
- N415MC
- Make and model
- Boeing 74747UF
- Aircraft serial
- 32837
- Aircraft time
- 30,072 hours, 4,803 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Acm
- Part number
- 7744694
- Part serial
- 200210031
- Condition
- Failed
- Location
- Nr 3
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.