# NTSB Accident SEA99LA088
> **Ryan NAVION B** · 1999-06-17 · KLAMATH FALLS, OR, USA · NONE
## Event
- **NTSB number:** SEA99LA088
- **Event ID:** 20001212X19118
- **Type:** Accident
- **Date:** 1999-06-17
- **Location:** KLAMATH FALLS, OR, USA
- **Coordinates:** 42.310104, -122.070068
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Ryan
- **Model:** NAVION B
- **Registration:** N870DR
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's failure to reinstall the engine oil filler cap during preflight, resulting in engine oil loss and the necessity for an immediate landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA99LA088) · AI Analytics · CC0 1.0*