AD 97-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | Airworthiness Directives; Boeing Model 737 Series Airplanes |
Unsafe Condition
The tracklock pin bearing of the tracklock bracket assembly may detach from its housing and wedge in the tracklock mechanism, causing the captain and first officer crew seats to slide horizontally on the track during acceleration and takeoff, resulting in uncommanded movement of the seats and reduced controllability of the airplane.
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Required Actions
Within 90 days after the effective date, perform a visual inspection of the seat identification labels to determine if the seats were modified with a bearing retaining pin and marked as required. If not, install the retaining pin and mark the labels per IPECO Service Bulletin A001-25-92. Prohibit installation of unmarked seats.
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Compliance Time
Within 90 days after the effective date of this AD
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Affected Aircraft
Boeing Model 737 series airplanes equipped with IPECO Model 093 captain and first officer crew seats, having seat serial numbers up to and including 21121
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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