SDR UIEA99071

Service difficulty report · Strap · Boeing 747230B

Difficulty date: August 31, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N509MC
Make and model: Boeing 747230B
Aircraft serial: 21221
System (JASC): 5400 · Nacelle/Pylon Structure
Part: Strap
Part number: 65B8910820
Condition: Cracked
Location: Pylon
Part time: 95,346 hours
Stage of operation: IN
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, 2, 3, 4, PYLONS EXTERIOR RIGHT PRE-COOLER EXHAUST CUTOUT FOUND WITH CRACK,AND NR 3 STIFFENER CRACK. REPAIRS CARRIED OUT IAW BOEING TELEXS AND SB 747-54-2163 R1 AND SB 747-54A2158 R2. THE SB REVS HAVE BEEN APPROVED ALTERNATE METHOD OF COMPLIANCE. (M)