# NTSB FTW95IA271: Saab-Scania SF340A, N112AE, Temple, TX, July 5, 1995

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: July 5, 1995, 16:35 local (21:35 UTC)
- Place: Temple, TX
- Coordinates: 31.079631, -97.249145 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.0796&lon=-97.2491&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed, report September 3, 1996
- Report: Approved by Office Director
- NTSB case key (mKey): 19272
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW95IA271
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19272/pdf
- Page: https://openairdocs.org/ntsb/FTW95IA271

## Probable cause

IMPROPER INSTALLATION OF THE RIGHT MAIN GEAR OUTBOARD WHEEL, WHICH RESULTED IN SEPARATION OF THE WHEEL FROM THE AXLE DURING TAKEOFF.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - landing gear,wheel - separation (cause)
  - maintenance,installation - improper, company maintenance personnel (cause)

## Analysis

AS THE AIRPLANE WAS TAKING OFF, A GROUND AGENT OBSERVED THE RIGHT MAIN GEAR OUTBOARD WHEEL SEPARATE FROM THE AXLE. THE FLIGHT CREW RETRACTED THE LANDING GEAR, BUT THE CREW NOTED NO UNUSUAL VIBRATIONS OR NOISES. THE FLIGHT CREW WAS INFORMED OF THE WHEEL SEPARATION BY COMPANY RADIO. THEY CONTINUED TO THE DESTINATION AIRPORT WHERE A FLY-BY CONFIRMED THE WHEEL WAS MISSING. A LANDING WAS MADE WITHOUT INCIDENT. INSPECTION OF THE AIRPLANE'S RIGHT MAIN GEAR AXLE REVEALED THE RETAINING NUT WAS STILL ATTACHED, AND THERE WAS MINOR DAMAGE TO THE AXLE ON THE OUTBOARD SIDE. ACCORDING TO THE OPERATOR, THE AIRCRAFT'S RIGHT OUTBOARD WHEEL HAD BEEN CHANGED ON THE MORNING OF THE INCIDENT WITHOUT THE USE OF A REQUIRED SPACER.

## Factual narrative

On July 5, 1995, at 1635 central daylight time, a SAAB-Scania SF340A, N112AE, registered to the AMR Corporation, and operated by Simmons Airlines as American Eagle flight 3710, on a 14 CFR Part 121 scheduled domestic passenger flight from the Draughon- Miller Municipal Airport (TPL), Temple, Texas, to the Dallas/Ft.Worth International Airport (DFW), Texas, sustained minor damage during takeoff.  The 3 crewmembers and their 3 passengers were not injured.  Visual meteorological conditions prevailed for the flight for which an instrument flight plan was filed.

A ground agent observed the outboard tire and wheel assembly separate from the right main landing gear during takeoff roll from runway 33.  The flight crew was informed of the wheel separation by company radio 10 minutes after takeoff.

According to the pilot, no unusual vibrations were felt nor noises heard during the retraction of the landing gear.  The flight continued to DFW where a fly-by confirmed the right main gear outboard wheel/tire was missing.  The flight landed on runway 13L without further incident.

Examination of the right main landing gear axle revealed that the retaining nut was still attached, and the outboard side of the axle sustained minor damage.

According to the operator, the aircraft's right outboard wheel had been replaced the morning of the incident.  Inspection of the removed wheel assembly revealed that the spacer was still attached by grease.  A check of the maintenance performed revealed that the when the new wheel was installed the required spacer was not put in place.

## Aircraft

- Registration: N112AE (not matched to a registry record)
- Reported make and model: Saab-Scania AB (Saab) SF340A
- Category: Airplane
- Serial number: 340A-112
- Airframe hours: 16492
- Engines: GE CT7-5AZ 1735 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 121
- Operator: Simmons Airlines, doing business as American Eagle
- Registered owner: Amr Leasing Corp
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, July 5, 1995, 2 hours before
- Departed: TPL
- Destination: DFW, DFW AIRPORT, TX
- Flight plan: IFR
- Airport: TPL, Draughom-Miller Municipal, runway 33, 6,301 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 10,400 total, 4,000 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 64 °F
- Altimeter: 30.00 inHg

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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