SDR UALA2011032801471

Service difficulty report · Duct · Boeing 757222

Difficulty date: March 26, 2011
Submitted: March 28, 2011
Operation: Air carrier
Aircraft: N542UA
Make and model: Boeing 757222
Aircraft serial: 25276
Aircraft time: 64,685 hours, 23,825 cycles
Engine: Pwa PW2037
System (JASC): 2120 · Air Distribution System
Part: Duct
Condition: Dirty
Location: Cabin
Stage of operation: NR
How discovered: O
Nature of condition: W
Precautionary procedure: O

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

What was found

CREW REPORT: RIGHT RECIRC FAN VERY LOUD, INTEFERES WITH COCKPIT COMMUNICATIONS, MUCH QUIETER WITH FAN OFF. COMPLIED WITH MEL TO DEACTIVATE THE RIGHT RECIRC FAN. PLZ WORK WITH CH1578. IF IT IS DETERMINED BLOCKAGES EXIST, AND GND TIME IS INSUFFICENT TO PERFORM DUCT CLEANING, SIGNOFF CH1578 & UPDATE DF WITH FINDINGS & A DUCT CLN WILL BE SLOTTED. FOUND SIDEWALL OUTLETS CLOGGED THROUGHOUT CABIN. REF CH1578 DUCTS REQUIRE CLEANING. WILL REQUIRE DUCT CLEANING AND SEVERAL SHIFTS TO ACCOMPLISH.