This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Sunday 27 September 1998 |
| Time: | 22:04 LT |
| Type: |  de Havilland Canada DHC-8-102 |
| Owner/operator: | Allegheny Airlines |
| Registration: | N810EX |
| MSN: | 308 |
| Total airframe hrs: | 17176 hours |
| Engine model: | P&W PW120A |
| Fatalities: | Fatalities: 0 / Occupants: 26 |
| Aircraft damage: | Minor |
| Category: | Accident |
| Location: | Islip, NY -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | Philadelphia, PA (PHL |
| (KISP) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was being vectored for a night instrument approach in visual meteorological conditions when it encountered severe turbulence. There were no other aircraft in the area when the turbulence occurred. The weather radar showed some thunderstorms to the north of the flight, but the ride had been smooth prior to the turbulence event. The airplane's flight data recorder revealed a gradual increase in vertical accelerations during a 15 second period. During the next 15 seconds, there were a series of jolts, with four vertical accelerations measuring approximately 2.0 positive g's, while three registered 0.5 negative g's. Vertical accelerations continued over the next 75 seconds, with eight exceeding 1.5 positive g's, and two registering about 0.0 g. Lateral and longitudinal accelerations were also noted, and corresponded in time with the vertical accelerations.
Probable Cause: Clear air turbulence.
Accident investigation:
 |
|
Sources:
NTSB NYC98LA193
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 09:51 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation