Service difficulty report · Intercostal · Boeing 737890

Difficulty date
October 29, 2017
Submitted
November 13, 2017
Operation
Air carrier
Aircraft
N588AS
Make and model
Boeing 737890
Aircraft serial
35685
Aircraft time
38,046 hours, 11,565 cycles
Part
Intercostal
Part number
141A52136
Condition
Corroded
Location
Fuselage
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

COCKPIT FLOOR PANEL SUPPORT FOR (211AF) AT BS 268.25 HAS CORROSION AROUND NUTPLATE AND FASTENER. GROUNDED - YES. REMOVED CORROSION ON MAIN CABIN FLOOR STRUCTURE LATERAL INTERCOSTAL AT STA 270 BETWEEN LBL10-RBL2.25 ORIGINAL THICKNESS .50, REMAINING THICKNESS .031, MATERIAL REMOVED .019. FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1. FABRICATED REPAIR PARTS USING 7075-0 .063 CCAD PO 870372.8 AND 7075-T6 .063 CLAD PO 903254.1. PERFORMED HEAT TREAT OF REPAIR PARTS (AS REQUIRED). ALSO PERFORMED HEAT AND PENETRANT INSPECTION OF REPAIR PARTS AND DAMAGED AREA (AS REQUIRED). LOCATED AND DRILLED ACC REPAIR PARTS, APPLIED ALODINE, AND PRIME AND INSTALLED ACC REPAIR PARTS. WORK PERFORMED IAW EA 800-53EA-19466 REV-00.