Service difficulty report · Bracket · Boeing 737

Difficulty date
January 7, 2022
Submitted
April 26, 2022
Operation
Air carrier
Aircraft
N7750A
Make and model
Boeing 737
Aircraft serial
36716
Aircraft time
44,331 hours, 22,434 cycles
Part
Bracket
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

SUPPLEMENTAL INFORMATION: CORROSION ON BRACKET BETWEEN BS 259.5-270 LBL 3- RBL 3 WL 208.1 AT NUTPLATES ; / [01] VERIFIED APPLICABILITY I.A.W SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.B; [02] REMOVED DAMAGE ON SUPPORT CHANNEL BS259-BS260 RBL3-LBL3 WL208 ORIG MAT THICKNESS IS 0.040 REMAINING MATERIAL THICKNESS IS 0.032 PART TO BE REPLACED DUE TO LOSS OF MATERIAL ALL I.A.W SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.B(2)DETAIL C;E; [03] REMOVED SUPPORT CHANNEL BS259.5-BS270 RBL3-LBL3 WL208 I.A.W SRM 51-40-02-0G-0; [04] VERIFIED SUPPORT CHANNEL IS OUT OF LIMITS I.A.W SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.B.<BR>CONFIRMED SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.B IS APPLICABLE.; [05] LOCATED AND DRILLED NEW SUPPORT CHANNEL BS 259.5-270; LBL 3 -RBL 3; WL 208.1 PER SRM 51-40-05-0G-0 AND BOEING DWG 141A5210. OK TO INSTALL.; [06] VERIFIED CORRECTIVE ACTIONS STEP 5.; [07] INSTALLED NEW SUPPORT CHANNEL BS 259.5-270; LBL 3 -RBL 3; WL 208.1 PER SRM 51-40-02-0G-0 AND BOEING DWG 141A5210.; [08] VERIFIED CORRECTIVE ACTIONS STEP 7.; [09] VERIFIED JOB COMPLETED.