SDR 2000UALA00179

Service difficulty report · Clamp · Boeing 777222

Difficulty date: April 7, 2000
Submitted: October 4, 2000
Operation: Air carrier
Aircraft: N779UA
Make and model: Boeing 777222
Aircraft serial: 26941
Aircraft time: 16,035 hours, 3,179 cycles
Engine: Pwa PW4077
System (JASC): 2120 · Air Distribution System
Part: Clamp
Part number: BACC10KH500R
Condition: Broken
Location: Air Cond Duct
Stage of operation: CR
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.

What was found

AFTER DEPARTING ORD EN ROUTE CDG, LOST RIGHT AIR CONDITIONING PACK AND GOT ADVISORY MESSAGE ON RT WING ANTI-ICE OVERHEAT. ALSO RECEIVED BLEED LOSS WING R STATUS MESSAGE. DIVERTED TO IAD. *S/D* FOUND BLEED LOSS RESULTED FROM DUCT SEPARATION AT LOWER FLOW CONTROL VALVE DUE TO LOWER FLOW CONTROL VALVE FORWARD CLAMP BROKEN (RE: IPC 21-51-01-001, ITEM 35, P/N: BACC10KH500R). REPLACED CLAMP AND RECONNECTED DUCTING. AIRCRAFT RETURNED TO REVENUE SERVICE.