# NTSB Incident ANC98IA026
> **Boeing 737-205** · 1998-03-11 · ANCHORAGE, AK, USA · NONE
## Event
- **NTSB number:** ANC98IA026
- **Event ID:** 20001211X09616
- **Type:** Incident
- **Date:** 1998-03-11
- **Location:** ANCHORAGE, AK, USA
- **Coordinates:** 61.160186, -149.989974
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 81
- **Total aboard:** 81
## Aircraft
- **Make:** Boeing
- **Model:** 737-205
- **Registration:** N733AR
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** Unk
## Probable cause

The dynamic imbalance in the yaw rate gyro, which provided input to the yaw damper and rudder.  A factor was the deteriorated grease in the gyro bearings.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC98IA026) · AI Analytics · CC0 1.0*