SDR DXTA2016040806229

Service difficulty report · Firewall · Cessna 750

Difficulty date: April 8, 2016
Submitted: April 25, 2016
Operation: Air carrier
Aircraft: N956QS
Make and model: Cessna 750
Aircraft serial: 7500156
Aircraft time: 14,142 hours, 8,726 cycles
System (JASC): 5312 · Fuselage Main, Bulkhead
Part: Firewall
Condition: Cracked
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

APU FIREWALL CRACKED UNDER LT UPPER TRUSS MOUNT ATA 51. REPAIRED IAW REPAIR DEFINITION S-750-0156 23PRD & SRM 51-40-03. DOUBLER & 6712625-15-2 FILLER WAS FABRICATED. MATCH DRILL 1 DOUBLER & 2 FILLER IAW DWG 6712625 & PRELIMINARY REPORT S-750-0156 23PRD. INSTALL 1 DOUBLER & 2 FILLER WITH MS21070L08K, 12 EACH & MS20427M, 24EACH IAW SRM 51-40-03. DOUBLER INSTALLED & FILLER INSTALL GOOD, FIREWALL INSTALLED & FASTENERS OVER SEALED.

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