Scribe Lines
Are you sure it's an FAA AD and not a FAA AC? Nevertheless be very, very careful with scribe lines. Many years ago someone used a scriber to mark the mast of a Westland Whirlwind helicopter and it went undetected until the scribed line propagated into a crack which eventualy lead to in-flight failure and mast separation. If I remember correctly, the accident killed the Commadore of the Queens Flight who was flying that day. I repeat, be very, very careful with scribe lines.
Last edited by Saint Jack; 21st Sep 2012 at 06:17.