Service difficulty report · None · Boeing 737*

Difficulty date
October 6, 2021
Submitted
November 22, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 737*
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
None
Condition
Corroded
Stage of operation
IN
How discovered
9
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

CORROSION ON BS 986 BEAM UPPER CHORD BS 986 RBL 39-44 WL208 ; / [01] REMOVED CORROSION ON BS 986 BEAM UPPER CHORD BS 986 RBL 39-44 WL 208 IN AREA OF 1' BY 5' BY A MAXIMUM OF 0.057' PER SRM 51-10-02-0G-0 AND SRM 53-70-51-1A-1. OUT OF LIMITS PER SRM 53-70-51-1A-1.; [02] REMOVED CORROSION ON BS 986 BEAM UPPER CHORD BS 986 RBL 39-44 WL 208 IN AREA OF 1' BY 5' BY A MAXIMUM OF 0.057' PER SRM 51-10-02-0G-0 AND SRM 53-70-51-1A-1. OUT OF LIMITS PER SRM 53-70-51-1A-1. USED DIAL DEPTH GAUGE ID: NCX000697 S/N: UNKNOWN TRIMMED INTERCOSTAL I.A.W SRM 53-70-51-2R-4 STEP 4.F(3) REQUEST D.V.I; [25] FLAP PEENED THE CUT EDGE OF THE INTERCOSTAL I.A.W SRM 53-70-51-2R-4 STEP 4.F(5); [26] LOCATED AND DRILLED ITEM 8 CORNER FITTINGS(2EA) I.A.W SRM 53-70-51-2R-4 STEP 4.G-M FIGURE 207 SHEET 1-5; [27] OK TO INSTALL INTERCOSTAL.; [28] INSTALLED REPAIR PARTS BS986 RBL18-RBL50 ITEM 1 T-CHORD(1EA);ITEM 2 ANGLE(2EA);ITEM 3 ANGLE(2EA);ITEM 4 STRAP(2EA) ITEM 7 SHEAR TIE (1EA) I.A.W SRM 53-70-51-2R-4 REPAIR 4 ALTERNATIVE 2 PAR 4.N-O EXCEPT WHERE THE FASTENER ARE COMMON TO INTERCOSTAL ON RBL38. CORNER FITTINGS AND INTERCOSTAL BS 986-