SDR USAABB08158

Service difficulty report · A/C Pack · Boeing 757225

Difficulty date: September 30, 2008
Submitted: November 12, 2008
Operation: Air carrier
Aircraft: N917UW
Make and model: Boeing 757225
Aircraft serial: 22193
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Malfunctioned
Location: Left
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: B, G

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

What was found

FLT 1100 - FL 350, WITH LT PACK ON MEL, FLT RECEIVED AN EICAS WARNING "CAB ALT". RT PACK INDICATED NORMAL. BEGAN DESCENT DONNED O2 MASKS AND DECLARED AN EMERGENCY. CABIN O2 MASKS NOT DEPLOYED. DESCENDED TO 10,000 FT. TURNED ON LT PACK AND RECEIVED NORMAL CABIN PRESSURE. FLT CONTINUED AT 15,000 FT AND LANDED WITHOUT FURTHER INCIDENT. MX PERFORMED A SINGLE PACK CONFIDENCE CHECK. OPS CHECKED GOOD.