SDR UIEA2011021200059

Service difficulty report · Sense Line · Boeing 747243B

Difficulty date: February 12, 2011
Submitted: February 14, 2011
Operation: Air carrier
Aircraft: N517MC
Make and model: Boeing 747243B
Aircraft serial: 23300
Aircraft time: 90,933 hours, 15,581 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Sense Line
Condition: Leaking
Location: Bleed System
Stage of operation: IN
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

APPROX 10,000 FT NR3 ENGINE "B" LOOP INDICATED 7.5 AND RISING. "A" LOOK 3.6 AND STEADY. WITHIN SECONDS OF NOTICING TEMP, NR 3 FIRE WARNING ILLUMINATED. ACCOMPLISHED FHB PROCEDURES, FIRE HANDLE WAS PULLED, ENGINE SHUTDOWN. INSPECTED NR 3 ENGINE, AND FOUND HIGH STAGE BLEED VALVE SENSE LINE FAULTY. HIGH STAGE VALVED LOCKED CLOSED AND DEACTIVATED. ITEM DEFERRED.