SDR 200200184

Service difficulty report · Flange · Boeing 747132

Difficulty date: March 21, 2002
Submitted: April 3, 2002
Operation: Air carrier
Filed by: ERKR675D
Marana Aerospace Solutions Inc
Aircraft: N479EV
Make and model: Boeing 747132
Aircraft serial: 19898
Aircraft time: 94,071 hours, 25,344 cycles
Engine: Pwa JT9D7A
System (JASC): 7250 · Turbine Section
Part: Flange
Condition: Cracked
Location: 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

CRACK FROM THE "R" FLANGE LIGHTNING HOLE TO THE FLANGE OUTER DIAMETER AT THE 12 O'CLOCK POSITION. RADIAL CRACK ( 1/2 INCH LONG) FROM THE "R" FLANGE LIGHTNING HOLE TO THE CASE WALL BUT NOT TO THE FILLET RADIUS AT THE 12:30 O'CLOCK POSITION. CRACK FROM THE "R" FLANGE LIGHTNING HOLE TO THE FLANGE OUTER DIAMETER AT THE 10 O'CLOCK POSITION. CRACK FROM THE "R" FLANGE LIGHTNING HOLE TO THE FLANGE OUTER DIAMETER AT THE 3 O'CLOCK POSITION. WELDED PER EIA ECRA# 662291-72-044-1 AND 747 MM 72-53-02.