SDR ASAA2016111818746

Service difficulty report · Duct · Boeing 737990ER

Difficulty date: November 18, 2016
Submitted: November 21, 2016
Operation: Air carrier
Aircraft: N479AS
Make and model: Boeing 737990ER
Aircraft serial: 60576
Aircraft time: 5,520 hours, 1,807 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Duct
Part number: 332A239012
Condition: Damaged
Location: Nr 1 Engine
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

REF T/C 78472000, NR 1 ENGINE, NOSE COWL TAI DUCT AT 12 O'CLOCK STRUT AREA HAS DAMAGE/TORN INSULATION BLANKET. GROUNDED, YES. REMOVED AND REPLACED NR 1 ENGINE INLET COWL TAI DUCT ASSY, REF PP BUILD-UP MANUAL 71-00-02. OPS AND LEAK TEST GOOD, REF B737-900 AMM 30-21-11-400-801. STEPS I AND J.