SDR UALA2011021500793

Service difficulty report · Controller · Boeing 777222

Difficulty date: February 15, 2011
Submitted: March 10, 2011
Operation: Air carrier
Aircraft: N206UA
Make and model: Boeing 777222
Aircraft serial: 30212
Aircraft time: 52,098 hours, 7,540 cycles
Engine: Pwa PW4090
System (JASC): 3610 · Pneumatic Distribution System
Part: Controller
Condition: Faulty
Location: Left Bleed
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

BLEED FAMV L LT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED OR LT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG01- LATCHED APPROACH MODE DEPENDENT; FAN AIR MODULATING VALVE (LT) TORQUE MOTOR CIRCUIT IS OPEN OR SHORTED. DB- AIR SUPPLY & CABIN PRESSURE CONTROLLER (L) MSG-3610521 LATCHD AP MODE. ITEM DEFERRED DUE TO NO TIME FOR T-S. MX PROCEDURE COMPLIED WITH. TO FLAG IRREGULARITY ONLY. REPLACED PRESSURE CONTROLLER AND OPS TEST OK. MESSAGE CLEARED.