SDR AALA202508195038

Service difficulty report · A/C Pack · Boeing 737823

Difficulty date: August 15, 2025
Submitted: August 19, 2025
Operation: Air carrier
Aircraft: N841NN
Make and model: Boeing 737823
Aircraft serial: 30914
Aircraft time: 45,229 hours, 19,343 cycles
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Contaminated
Location: Zone 100
Stage of operation: CL
How discovered: O
Nature of condition: C, B
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF SMOKE REPORTED IN THE CABIN BY FLIGHT ATTENDANTS AND PASSENGER. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT BZN. ACCOMPLISHMENT W/C 08L00021001. INSPECTED APU COMPARTMENT AND INLET FOR CONTAMINATION NONE NOTED. INSPECTED NUMBER 1 ENGINE INLET AND OGV'S WITH UV LIGHT FOR OIL LEAKS AND BIRD STRIKES. NONE NOTED. ACCOMPLISHED AMM 21-00-01. REMOVE OIL CONTAMINATION FROM AC AND PACK SYSTEM.