SDR UIEA200600158

Service difficulty report · Duct · Boeing 7472D7B

Difficulty date: July 2, 2006
Submitted: July 14, 2006
Operation: Air carrier
Aircraft: N528MC
Make and model: Boeing 7472D7B
Aircraft serial: 22472
Aircraft time: 77,188 hours, 15,337 cycles
Engine: Ge CF650E2
Engine time: 69,935 hours, 13,991 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Duct
Part number: 1991M85601
Condition: Ruptured
Location: Nr 4 Engine
Stage of operation: TO
How discovered: O
Nature of condition: M, J
Precautionary procedure: E, F, A

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

What was found

FOLLOWING TAKEOFF NR 4 ENG FIRE INDICATIONS NACELLE TEMPS A/B HIGH, THEN TO FIRE "F" AND FULL WARNING ENG NR 4 SHUTDOWN AS PER CHECKLIST. NR 4 ENG FIRE BOTTLE "A" DISCHARGED, FIRE WARNING EXTINGUISHED. FOUND 14TH STAGE BLEED AIR DUCT RUPTURE. REMOVED AND REPLACED DUCT AS PER MM 36-11-01. PFMD ENG TEST NR 4 AS PER MM 71-00-00. ALL INDICATION NML, DUCT LOCATION ENG RT SIDE. REMOVED AND REPLACED RT "A" FIRE EXTINGUISHER CONTAINER AS PER MM 26-21-03. ACCOMPLISHED EXTINGUISHER AGENT CONTAMINATION CHECK AS PER MM 72-00-00. CHECKS OK.

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