SDR UALA2012011900414

Service difficulty report · Duct · Boeing 757222

Difficulty date: January 19, 2012
Submitted: February 14, 2012
Operation: Air carrier
Aircraft: N530UA
Make and model: Boeing 757222
Aircraft serial: 25043
Aircraft time: 69,032 hours, 25,634 cycles
Engine: Pwa PW2037
System (JASC): 2120 · Air Distribution System
Part: Duct
Condition: Dirty
Location: Cockpit
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

COCKPIT NOISE. ACP'D NOISE CHECK PER MM, FAILED CHECK 76 DCB. REMOVED OVERHEAD DISTRIBUTION DUCT NOZZLE ASSY AND RESTRICTOR PLATE ASSY AT ROW 37 AND FOUND RESTRICTOR PLATE HOLES 90% BLOCKED WITH DEBRIS. CLEANED OVERHEAD DISTRIBUTION DUCT FROM ROW 12 TO 37. OVERHEAD DISTRIBUTION DUCT INTERNAL SUPPORTS FOUND DISBONDED FROM DUCTS FROM ROW 30 TO 35. REPAIRED SUPPORTS FROM ROW 30 TO 32, WITH TEMPORARY FASTENERS INSTALLED. REMAINING SUPPORTS NEED SECURED.