Service difficulty report · Ring · Boeing 7377H4

Difficulty date
August 22, 2012
Submitted
August 22, 2012
Operation
General aviation
Filed by
Z6WR336Y
Spirit Aerosystems Inc
Aircraft
N712SW
Make and model
Boeing 7377H4
Aircraft serial
27846
Aircraft time
51,567 hours
Part
Ring
Part number
315A229594
Part serial
000053
Condition
Worn
Location
Thrust Reverser
Part time
51,567 hours
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

CMM 78-31-37 REV 24 01JUL2012 SB 737-78-1072 REV 00 16JUN2005 INSPECTION FINDING OF 1 MISSING BACB30LE6K29 BOLT (FIGURE 12, ITEM 100) COMMON TO THE LOWER AFT HOLE OF THE 315A2222-5 CASCADE RING AND THE 315A2402-6 BEAM ASSY AND 1 EA BACB30LE6K29 COMMON TO THE FWD HOLE OF THE CASCADE SUPPORT RING AND THE LATCH BEAM IS LOOSE. THE 2 .375/.379 HOLE LOCATIONS FOR BACB30LE6K29 BOLTS C/T THE 315A2222-5 CASCADE RING ASSY ARE ELONGATED. CORRESPONDING .375 / .379 HOLE LOCATION FOR THE FWD MOST BACB30LE6K29 BOLT C/T THE 315A2402-6 LATCH BEAM FITTING (FIG 22, ITEM 325C) IS ELONGATED. ALSO A DEEP AREA OF WEAR AROUND THE FWD HOLE LOCATION C/T THE -6 BEAM INBOARD SURFACE. CORRESPONDING .4040 / .4160 HOLE LOCATION FOR THE AFT MOST BACB30LE6K29 BOLT C/T THE 315A2402-6 LATCH BEAM FITTING IS ELONGATED. THERE IS ALSO A DEEP AREA OF WEAR AROUND THE FWD HOLE LOCATION C/T THE -6 BEAM INBOARD SURFACE.

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