SDR AALA202209066886

Service difficulty report · Controller · Boeing 777223

Difficulty date: September 2, 2022
Submitted: September 6, 2022
Operation: Air carrier
Aircraft: N773AN
Make and model: Boeing 777223
Aircraft serial: 29583
Aircraft time: 89,566 hours, 11,358 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Controller
Part number: 11511007
Condition: Faulty
Location: Zone 100 - Fuse
Stage of operation: CL
How discovered: V
Nature of condition: O
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: ON CLIMB OUT, RIGHT ENGINE EPR, N1 AND EGT FLUCTUATED RAPIDLY. RIGHT PACK PRESSURE ALSO FLUCTUATED. EMERGENCY DECLARED; FLIGHT RETURNED TO CLT LANDING SAFELY. REPLACED #2 AIR SUPPLY CABIN PRESSURE CONTROLLER (ASCPC) PER AMM 36-11-20. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK. PERFORMED ENGINE 2 IDLE RUN PER AMM 71-00-00 WITH ALL ENGINE PARAMETERS NORMAL, PRE-COOLER TEMPERATURE STEADY AND RIGHT PACK PRESSURE STEADY.