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| Title: | Runway excursion after landing, involving a Boeing 747SP, B-18253, at Chiang Kai-shek International Airport on September 2, 1999 (Recommended) |
| Micro summary: | High-speed exit maneuver off a runway involving a Boeing 747SP results in a runway excursion. |
| Event Time: | 1999-09-02 at 1148 Taipei time |
| File Name: | 1999-09-02-TW.pdf |
| Publishing Agency: | Aviation Safety Council (ASC) |
| Publishing Country: | Taiwan |
| Report number: | ASC/AIR-2000/01 |
| Pages: | 115 |
| Site of event: | Landing, Chiang Kai-shek International Airport |
| Departure: | Taipei Chiang Kai Shek International Airport, Taiwan |
| Destination: | Taipei Chiang Kai Shek International Airport, Taiwan |
| Airplane Type(s): | Boeing 747-SP |
| Flight Phase: | Landing |
| Registration(s): | B-18253 |
| Operator(s): | China Airlines |
| Type of flight: | Training |
| Occupants: | 10 |
| Fatalities: | 0 |
| Serious Injuries: | 0 |
| Minor/Non-Injured: | 10 |
| Other Injuries: | 0 |
| Executive Summary: | On 2 September 1999, a China Airlines Boeing 747SP (B-18253) Flight Dynasty Training 2 landed on Runway 06 at the Taoyuan Chiang Kai-shek International Airport (CKS Airport) after a type check flight of two first officers undertaking transition training. During the landing roll with half of the runway remaining, the pilot-in-command attempted to depart the runway by steering left into Taxiway S5 at 76.8 knots. The aircraft, however, failed to make the turn. At 11.48 local time, its left body gear and nose gear collided with a protruding concrete manhole approximately 11 meters from the edge of the runway on the grass strip adjacent Taxiway S5, snapping the front and rear axles of the left body gear truck, separating #5 and #6 wheels, and damaging the belly’s skin and structure, while #1 engine came into contact with the ground. The probable causal factors are as follows: (a) the pilot-in-command failed to select before touchdown a point to depart the runway based on the aircraft’s braking characteristics; (b) reverse thrust, brakes and body gear steering were not applied at a desired speed; and (c) nose gear steering was applied before reaching a desired rolling speed; (d) light weight and an aft center of gravity towards the rear increased the aircraft’s tendency to pitch up, causing the nose wheel to slip laterally despite the actuation of nose gear steering, and (e) the aircraft veered to the side of the runway onto the grass strip rather than turning into Taxiway S5. The protruding manhole to the left of Runway 06 is an indirect cause of the occurrence. The location, structure and construction of the manhole failed to meet both domestic specifications, as well as those recommended by the International Civil Aviation Organization (ICAO), causing serious damages to the deviated aircraft when its landing gear collided with the manhole. |
| Learning Keywords: | Operations - Runway Excursion |
| Systems - Landing Gear | |
| Systems - Landing Gear - MLG Collapse | |
| Systems - Landing Gear - Tires | |
| Consequence - Damage - Airframe or fuselage |
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