SDR DALA1117259870

Service difficulty report · Stiffener · Doug DC951

Difficulty date: February 26, 2011
Submitted: March 14, 2011
Operation: Air carrier
Aircraft: N779NC
Make and model: Doug DC951
Aircraft serial: 48101
Aircraft time: 71,333 hours, 66,584 cycles
System (JASC): 5420 · Nacelle/Pylon Miscellaneous Structure
Part: Stiffener
Condition: Cracked
Location: Nr 1 Pylon
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

NR 1 ENGINE PYLON UNDER PANEL 8101A FWD STIFFENER CRACKED AT I/B END. REMOVED CRACKED STIFFENER ON NR 1 ENGINE PYLON UNDER PNL 8101A IAW DC-9 SRM 51-30-5, 51-30-2. FABBED, FORMED, DRILLED, COUNTERSUNK NEW STIFFENER FROM .040 2024-T3 IAW DC-9 SRM 54-10-0 FIG 1, 51-10-4. TREATED, PRIMED IAW DC-9 SRM 51-10-3. INSTALLED NEW STIFFENER IAW DC-9 SRM 51-30-5.

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