Flight History
On 14 August 2022, a Boeing 737-300F aircraft, registered PK-YGV, operated by PT Tri MG-Intra Asia Airlines (Asia Cargo Airlines), was conducting an unscheduled cargo flight from Soekarno-Hatta International Airport, Jakarta, to Syamsudin Noor International Airport, Banjarmasin. The flight departed Jakarta at 0335 UTC in daylight conditions, cruising at an altitude of 32,000 feet. On board were two pilots, one engineer, and one flight operations officer. The Pilot in Command (PIC) acted as Pilot Monitoring (PM), while the Second in Command (SIC) acted as Pilot Flying (PF). The flight was uneventful until the approach to Banjarmasin.
At 0441 UTC, the pilot contacted Banjarmasin Approach Controller while descending through 30,000 feet, on radial 255° at 106 nautical miles from Banjarmasin. Clearance was received to descend to 3,000 feet direct to LIBNU point. At 0459 UTC, the pilot reported intercepting the localizer for Runway 10. The tower controller issued landing clearance and reported wind from 050° at 7 knots.
At an altitude of 1,200 feet, after selecting flaps from position 30 to 40, the pilot noticed that the flap indicator needles split, indicating asymmetry, and the aircraft tended to roll to the left. The pilot executed a go-around and flew to LIBNU point. During the go-around, the flap lever was recycled, but the asymmetry persisted, with the right needle showing about 30 and the left needle about 10. The pilot then performed the non-normal checklist for trailing edge flap asymmetry and configured the aircraft for landing.
With the asymmetry still present, the pilot decided to land using the Instrument Landing System (ILS) for Runway 10. At 0530 UTC, the aircraft was on final approach and received landing clearance. At 0534 UTC, prior to touchdown, the aircraft rolled to the left, causing the left wingtip and left engine cowling to contact the runway surface. The pilot managed to level the aircraft, touched down, stopped on the runway, and then taxied to the apron.
Damage
The aircraft sustained minor damage. Scratches were found on the lower surface of the left engine cowling, the lower surface of the left slat leading edge, and the left wing tip. Additionally, wrinkles and dents were observed on the upper surface of the left wing.
Safety Recommendations
The initial investigation identified a safety issue in the recording and reporting system. A safety recommendation was issued to the aircraft operator to address this identified safety issue.