SDR DALA1017860649

Service difficulty report · Unknown · Boeing 757232

Difficulty date: July 27, 2010
Submitted: August 2, 2010
Operation: Air carrier
Aircraft: N649DL
Make and model: Boeing 757232
Aircraft serial: 24389
Aircraft time: 72,364 hours, 32,289 cycles
System (JASC): 2120 · Air Distribution System
Part: Unknown
Condition: Odor
Location: Cockpit
Stage of operation: CR
How discovered: O
Nature of condition: B
Precautionary procedure: A

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

What was found

FOUR HOURS INTO FLIGHT AND CRUISING AT FL 340, AN ELECTRICAL, CHEMICAL ODOR DEVELOPED IN THE COCKPIT. FLIGHT CREW DONNED O2 MASKS, DIVERTED, DECLARED EMERGENCY, AND LANDED UNEVENTFULLY. MX REPLACED THE L1 WINDOW, L1 WINDOW HEAT CONTROLLER, AND THE L1 WINDOW HEAT HARNESS. FUNCTIONAL CHECK OF THE SYS IS GOOD.