| Mandala Airlines Flight 660 | |
| Occurrence Type: | Accident |
| Date: | 24 July 1992 |
| Type: | Microburst-induced wind shear, controlled flight into terrain by pilot error |
| Site: | Mt. Lalaboy, Indonesia |
| Aircraft Type: | Vickers Viscount 816 |
| Aircraft Name: | Nias |
| Operator: | Mandala Airlines |
| Tail Number: | PK-RVU |
| Origin: | Sultan Hasanuddin International Airport, Makassar, Indonesia |
| Destination: | Pattimura Airport, Ambon, Indonesia |
| Passengers: | 63 |
| Crew: | 7 |
| Fatalities: | 70 |
| Survivors: | 0 |
Mandala Airlines Flight 660 was a scheduled passenger flight on 24 July 1992 which crashed in Indonesia into a mountain on Ambon Island as it attempted to land at Pattimura Airport in poor weather conditions.
On approach to Pattimura, the aircraft struck the slope of Mt. Lalaboy about 14 km southwest of Runway 04 while trying to land in heavy rain, at around 16:30 local time. The aircraft disintegrated on impact and there were no survivors.
The cause was attributed to pilot error after the aircraft was approaching at an insufficient altitude, possibly caused by windshears. It was possible that the pilots were following instruments that may have given false readings or had malfunctioned.[1] [2]
The aircraft was a Vickers Viscount 816 serial number 434, which first flew on 8 June 1959.[3] It was delivered on 17 June 1959 to Trans Australia Airlines as VH-TVQ and named McDouall Stuart which operate until 1970. It later leased to Far Eastern Air Transport and Merpati Nusantara Airlines. By 1987, it had been bought by Mandala Airlines and was registered PK-RVU and name Nias.