# NTSB FTW87IA108: Canadair CL-600, N600KC, Denton, TX, April 28, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: April 28, 1987, 08:00 local (13:00 UTC)
- Place: Denton, TX
- Coordinates: 33.189716, -97.12902 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.1897&lon=-97.1290&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 11 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 22284
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW87IA108
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22284/pdf
- Page: https://openairdocs.org/ntsb/FTW87IA108

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - mech failure/malf, climb - to cruise
  - turbine assembly,turbine blade - failure,total (cause)
  - turbine assembly,turbine blade - fatigue (cause)
  - precautionary landing - performed, pilot in command
  - inadequate quality control, manufacturer (cause)

## Analysis

THE AIRCRAFT'S RIGHT ENGINE, WHILE IN FLIGHT, LOST A BLADE FROM ITS FOURTH STAGE TURBINE WHEEL DUE TO METAL FATIGUE. THIS RESULTED IN VARYING DEGREES OF DAMAGE THROUGHOUT THE ENTIRE ENGINE AND CAUSED THE ENGINE TO SHUT ITSELF DOWN WHILE CLIMBING THROUGH 19,000 FEET. THE AIRCRAFT HAD DEPARTED DALLAS, TX, 19 MINUTES EARLIER. AFTER THE ENGINE FAILURE THE FLT RETURNED TO DALLAS WHERE A SINGLE ENGINE UNEVENTFUL LANDING WAS ACCOMPLISHED. EXAMINATION OF THE FAILED BLADE REVEALED THE METAL FATIGUE WAS THE RESULT OF EXCESS POROSITY WHICH WAS PRESENT WHEN THE BLADE WAS CAST. THE MANUFACTURER AGREES THAT THIS IMPERFECTION SHOULD HAVE BEEN DETECTED BY THEIR INSPECTION METHODS AND THE BLADE REJECTED. THE BLADE FAILED AFTER ABOUT 400 HOURS OF OPERATION.

## Aircraft

- Registration: N600KC (not matched to a registry record)
- Reported make and model: CANADAIR CL-600
- Category: Airplane
- Serial number: 1012
- Airframe hours: 1310
- Engines: LYCOMING ALF-502L-2 7500 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Executive/Corporate, Part 91
- Registered owner: Kimberly Clark Corp.
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, March 5, 1987, 35 hours before
- Departed: DAL, DALLAS, TX
- Destination: ATW, APPLETON, WI
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 8,700 total, 85 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 20 statute miles
- Lowest ceiling: none

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19870428060379I](https://openairdocs.org/incident/19870428060379I), Apr 28, 1987: Cndair CL600*, Denton, TX, Minor damage. The plane safely returned after right engine failure during climb. Fourth stage compressor blade fatigue failure.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.