Attached are photos of the repair, one with bolts removed from doubler and one with doubler removed from hat section showing the damage to the spar, presumably cut out.
The log book states "repaired cabin spar per Cessna Engineering instruction".
There is no form 337 in the FAA records.
The work was signed out by Cruse Aviation Inc, no 2016, Houston 17, Texas on 7-22-75
Do these people still exist? Would they have any record other than that in the log book?
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