
SDR 510021337 | Proppellerwerk HOV62R Propeller blade section—screw sheared. No. 1 propeller blade lag screw sheared. Sheared screw head jammed in feathering mechanism preventing blade from feathering. Evidence of corrosion at point of failure.

SDR 510021336 | Fokker F28 MK0100 Horizontal stabiliser plates/skin—screw corroded. Horizontal stabiliser leading edge attachment screws corroded. Steel screws P/No NAS517 were fitted instead of the correct titanium screws P/No NAS5030. Suspect screws had been fitted by a previous operator. P/No: NAS517.