What was found
AIRCRAFT WAS GROUNDED: UNABLE TO COOL AIRCRAFT AND ODOR ON TAKE OFF AND CLIMB. DECESION MADE TO RETURN TO LHR. LANDED WITHOUT INCIDENT. MAINTENANCE CONFIRMED RH A/C PACK ACM FAILED AND REPLACED RH ACM IAW AMM 21-51-02.
- Difficulty date
- July 30, 2025
- Submitted
- August 2, 2025
- Operation
- Air carrier
- Aircraft
- N722AN
- Make and model
- Boeing 777323ER
- Aircraft serial
- 31547
- Aircraft time
- 48,832 hours, 5,730 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Acm
- Condition
- Odor
- Location
- Zone 100
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- B
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.