SDR DALA1138309861

Service difficulty report · Web · Doug DC951

Difficulty date: June 6, 2011
Submitted: June 7, 2011
Operation: Air carrier
Aircraft: N770NC
Make and model: Doug DC951
Aircraft serial: 47758
Aircraft time: 75,864 hours, 73,207 cycles
System (JASC): 5420 · Nacelle/Pylon Miscellaneous Structure
Part: Web
Condition: Cracked
Location: Nr 2 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 2 PYLON AFT ENGINE MOUNT LWR SUPPORT STRUCTURE WEB AND EXISTING REPAIR CRACKED STA YN 174 VIEWED THRU ACCESS DOOR 8206A. NDT VERIFIED CRACK IN DOUBLER APPROX 2 INCHES LONG. REMOVED REPAIR DOUBLER PER DC9 SRM 51-30-2. STOP HOLE ON CRACK PER DC9 SRM 54-01 PG 9. FABBED DOUBLER REPAIR PER DC9 SRM 54-01 PG 9 NDT CHECKED NO CRACKS DETECTED BEYOND STOP DRILL HOLE. INSTALLED REPAIR DOUBLER PER DC9 SRM 54-01 PG 9 FIG 2.

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