SDR CA980916064

Service difficulty report · Valve · Lkheed 10113851

Difficulty date: August 19, 1998
Submitted: March 26, 2000
Operation: Air carrier
Make and model: Lkheed 10113851
Engine: Rroyce RB21122B02
System (JASC): 2160 · Cabin Temperature Control System
Part: Valve
Condition: Overheated
Location: Nr 3 Pack
Stage of operation: LD
Nature of condition: B
Precautionary procedure: K

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

What was found

(CAN) ON FINAL APPROACH, NR 3 PACK FLOW CONTROL VALVE OVERHEAT LIGHT CAME ON. ON TOUCHDOWN, CABIN FILLED WITH SMOKE, PACK WAS IN AUTOMODE. IN-FLIGHT FLOW BAR WAS CYCLING CONSTANTLY, BUT NO OVERHEAT OBSERVED. PACK FLOW CONTROL VALVE AND TURBINE BYPASS REPLACED AND OPERATIONAL CHECK OK.