I'm considering the purchase of a Piper PA-28R Arrow. I calculated the factored service hours which came up to around 2500 or half of the required FSH to make it subject to the recent Piper wing spar AD 2020-26-16. The AD does also require aircraft with "missing or incomplete" logs to comply by performing the inspection outlined in the AD.
The aircraft in question has logs going back to the year of manufacture, however, there is one small gap in the late 70s. A subsequent log entry states previous log lost in hangar fire. The gap is about 6 months in duration, and there were approximately 70 hours accumulated in that time.
Does this small gap in the logbooks make this aircraft subject to the inspection requirements in the AD? I would think that since only 69 hours were accumulated that it would not, but I'd appreciate any expert opinions on the subject. Thanks!