SDR DLL10954420

Service difficulty report · Duct · Lkheed 10113851

Difficulty date: November 16, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N721DA
Make and model: Lkheed 10113851
Aircraft serial: 193C1139
System (JASC): 2150 · Cabin Cooling System
Part: Duct
Condition: Ruptured
Location: Nr 3 Acm
Component: 1505475163D
Stage of operation: CR
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

AT FL 370 HEARD LOUD BANG, POSSIBLY PNEU IN NATURE. CABIN PRESSURE NORMAL, ENGINE BLD CONT PANEL PSIG NORMAL. SUBSEQUENTLY C/D ZONES TURNED ICE COLD, WAS ABLE TO SUPPLY MAX HOT TEMP IN DUCT SUPPLY, BUT ZONE NEVER WARMED UP. SUSPECT POSSIBLE DUCT FAILURE. FOUND RT O/B DUCT RUPTURED ON NR 3 ACM. REPLACED SAME, OPERATION NORMAL.