Garlick UH-1H N98NW
19 May 1998 · Hope, Idaho, United States · No injuries
Summary
On 19 May 1998 at about 17:15 local time, a Garlick UH-1H registered N98NW was involved in an accident near Hope, Idaho, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 17:15
- Classification
- Accident
- Location
- Hope, Idaho, United States
- Coordinates
- 48.2605, -116.2407
- Aircraft
- Garlick UH-1H
- Registration
- N98NW
- Category
- Helicopter
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 133: Rotorcraft Ext. Load
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- SEA98FA077
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
Failure of a misaligned main bearing in the engine. Factors include returning a previously unairworthy-tagged engine to service by the operator's maintenance personnel without sufficient information to identify and correct an unknown engine deficiency.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot reported that he had dropped off a load of chokers and was maneuvering to hook up to a load of logs when the engine began to make 'a weird squealing noise, followed by a constant series of compressor stalls, occurring about twice per second.' The airplane then lost all engine power, and the pilot performed a forced landing in a clearing. Post Crash Examination revealed that the No. 1 bearing (P/N:1-300-015-04; S/N:127AC) was heavily damaged. From observations of damage on the bearing raceways and the inner ring split faces, evidence indicated that both thrust and non-thrust sides of the inner ring had been misaligned, based upon ball path indications. Military records for the engine included an Unserviceable Tag. No evidence was found of specifics related to that failure code, nor was evidence found recording related corrective maintenance action
Quoted verbatim from the NTSB record.
Other Garlick UH-1H accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 14 Dec 1998 | Garlick UH-1H | Darrington, Washington, United States | - | Serious injuries | - |
| 18 Jun 1998 | Garlick UH-1H | Couer D'alene, Idaho, United States | - | No injuries | - |
| 24 Jul 1998 | Garlick UH-1H | Libby, Montana, United States | Northwest Helicopters, Inc. | Serious injuries | - |
| 21 Sep 1999 | Garlick UH-1H | Usk, Washington, United States | - | No injuries | - |
| 22 May 1997 | Garlick UH-1H | Lolo, Montana, United States | Northwest Helicopters | No injuries | - |
| 3 Jun 1997 | Garlick UH-1H | Addy, Washington, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 26 Feb 1998 | Freije LANCAIR IV | Garwood, Idaho, United States | - | Fatal | 2 |
| 3 Mar 1998 | Cessna T303 | Midvale, Idaho, United States | Jeffrey J. Johnson | Fatal | 6 |
| 21 May 1998 | Cessna P206C | Dubois, Idaho, United States | - | Fatal | 3 |
| 30 May 1998 | Papa 51 THUNDER MUSTANG | Marsing, Idaho, United States | - | Fatal | 2 |
| 2 Jun 1998 | McDonnell Douglas 369FF | Shoshone, Idaho, United States | Winco | Fatal | 1 |
| 31 Jan 1998 | Cessna 180 | Sun Valley, Idaho, United States | - | No injuries | - |