# NTSB Accident NYC92LA166
> **MITSUBISHI MU-2-60** · 1992-08-18 · PHILADELPHIA, PA, USA · NONE
## Event
- **NTSB number:** NYC92LA166
- **Event ID:** 20001211X15511
- **Type:** Accident
- **Date:** 1992-08-18
- **Location:** PHILADELPHIA, PA, USA
- **Coordinates:** 40.070541, -75.000778
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** MITSUBISHI
- **Model:** MU-2-60
- **Registration:** N66LA
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

THE IN-FLIGHT SEPARATION OF A PROPELLER BLADE AS A RESULT OF FATIGUE CRACKING INITIATED FROM MULTIPLE SITES LOCATED AT CORROSION PITS IN THE BALANCING HOLE.  CONTRIBUTING FACTORS IN THE ACCIDENT WERE: THE FAILURE TO DETECT THE CORROSION DURING THE LAST OVERHAUL PROCEDURE; AND A COMPLETE LOSS OF ELECTRICAL POWER AS RESULT OF THE SEPARATED BLADE BREAKING THE ELECTRICAL LINES.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=NYC92LA166) · AI Analytics · CC0 1.0*