# NTSB Incident LAX04IA311
> **Sikorsky S-70A** · 2004-08-30 · Pacoima, CA, USA · NONE
## Event
- **NTSB number:** LAX04IA311
- **Event ID:** 20040929X01532
- **Type:** Incident
- **Date:** 2004-08-30
- **Location:** Pacoima, CA, USA
- **Coordinates:** 34.259723, -118.413612
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** Sikorsky
- **Model:** S-70A
- **Registration:** N160LA
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the failure of the operator's mechanics to install the turboshaft engine's forward curvic seal during a gas generator turbine (GGT) replacement.  Contributing factors to the incident were the failure of the manufacturer to provide a forward curvic seal with the replacement GGT, and the lack of a curvic seal installation verification inspection in the maintenance manuals following the GGT installation.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX04IA311) · AI Analytics · CC0 1.0*