# NTSB Accident ERA15LA123
> **AMERICAN AA-1** · 2015-02-08 · Fort Meade, MD, USA · SERS
## Event
- **NTSB number:** ERA15LA123
- **Event ID:** 20150209X81643
- **Type:** Accident
- **Date:** 2015-02-08
- **Location:** Fort Meade, MD, USA
- **Coordinates:** 39.085834, -76.769165
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** AMERICAN
- **Model:** AA-1
- **Registration:** N6116L
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The mechanic’s failure to detect the incorrect dry valve tappet clearances while troubleshooting ongoing engine issues, which resulted in partial loss of engine power during takeoff. Contributing to the partial loss of engine power was the mechanic's failure to inspect the dry tappet clearances in accordance with the engine operator's manual and a referenced service instruction.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA15LA123) · AI Analytics · CC0 1.0*