Incident Overview
On 3 November 1999 at 1857 UTC, a Piper PA-23-250 (registration G-KEYS) was preparing for a private flight from Glasgow Airport to Londonderry Eglinton. The aircraft, powered by two Lycoming IO-540-C4B5 piston engines, was manufactured in 1978. The pilot, aged 65, held a Commercial Pilot's Licence with an Instrument Rating and had accumulated 3,800 flying hours, over 3,000 of which were on type.
Sequence of Events
After receiving an ATC clearance to taxi, the pilot was issued a further clearance for takeoff from Runway 23 at the 'B' taxiway intersection. The pilot taxied towards the runway in darkness, noting landing lights of other traffic on approach to Runway 23 and hearing a message about landing traffic at 4 nm from touchdown. As the aircraft approached the runway, the left propeller contacted an unlit temporary edge light unit on the left side of the 'B' intersection.
Post-Incident Actions
No engine vibration was apparent during a full-power check, and the pilot continued the flight to Londonderry. Upon arrival, damage to both propeller tips was observed, apparently from contact with concrete or tarmac. One blade also had a nick in the tip, likely from contact with the light unit. After assessment, the aircraft was ferried to a nearby repair facility the following day. The pilot subsequently reported the incident to the AAIB.
Pilot Commentary
The pilot noted that the haste to enter the runway and take off was somewhat self-induced, as the landing lights of approaching traffic appeared closer than they actually were. He also commented that he could have made better use of the aircraft's own landing lights. The airfield was subject to Notams regarding overnight runway work. The full taxiway width of 23 metres was available at Link 'B', marked with green centreline lights. One temporary light unit was found damaged.
Damage and Injuries
Minor damage occurred to both blades of the left propeller. The crew (1) and passengers (2) reported no injuries.