There is a CRANKSHAFT GEAR RETAINING BOLT AD 2004-10-14 effective June 25,
2004, which redefines "prop-strike" and states:

"(e) Compliance with this AD is required as indicated before further flight
if the engine experiences a propeller strike after the effective date of
this AD, as defined in paragraphs (i) and (j) of this AD. "

There is some disagreement amongst some of us whether this AD demands

1. replacement of the retaining bolt & lockplate after the effective date of
the AD on ALL "prop-strikes" -as newly defined- occuring BEFORE&AFTER the AD
or whether the AD demands only

2. replacement of the retaining bolt & lockplate ONLY on "prop-strikes"- as
newly defined- occuring AFTER the effective date of the AD.

Does anyone have experience or information to clarify this for me? My
interpretation is (2).
Thanks,

Tien

PS: on my pre-purchase inspection of a Cessna 177, we found this AD was not
complied with, but we wonder if it is applicable since the incident was
before the effective date of the AD.