SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 150 · Airworthiness Directives
Overview
This document is a schedule of airworthiness directives specifically for the Cessna 150 series aircraft, including models 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, A150K, A150L, A150M, F150G, F150H, F150J, F150K, F150L, F150M, FA150K, FA150L, FRA150L, and FRA150M. It outlines a specific directive (AD/CESSNA 150/42) regarding the routing of battery and battery contactor cables to prevent potential failures of the elevator control cable. The directive is a response to a fatal accident involving a Cessna 150D, emphasizing the importance of proper cable management to avoid electrical shorts and subsequent failures. Compliance with the directive is required within a specified timeframe to ensure safety and airworthiness.
- The directive applies to multiple Cessna 150 models including 150D, 150E, 150F, and others.
- Battery cable must be tied to the battery box cover lock pin with specified materials.
- Maintain a minimum of one inch clearance between the battery cable and the elevator up cable.
- Visual inspections of the battery and elevator cables for damage are required before the next flight.
- Compliance is required within 25 hours of service after August 20, 1988.
Document
Source
Originally published by services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 1988
- Pages
- 1
- File size
- 11 KB
- Publisher
- services.casa.gov.au
Common. Rarer than 0% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the Cessna 150.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & WiringNot on file
- Service BulletinsNot on file
- Type Certificate (TCDS)
Free — save the 150 to your watchlist and track it in one place.
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In this document
Applicability
The directive applies to various models of the Cessna 150 series, including 150D through 150M, as well as A150, F150, FA150, and FRA150 variants. It covers all serial numbers that have undergone modifications relocating the battery from its original position.
Requirement
To prevent failure of the up elevator cable, the directive requires that the battery to battery contactor cable be tied to the lock pin of the battery box cover using specified materials to ensure a minimum clearance of one inch between the battery cable and the elevator up cable. Additionally, a visual inspection of both cables for damage is mandated.
Compliance
Compliance with the directive must be achieved within 25 hours of service after August 20, 1988. This timeframe is critical to ensure that any potential issues are addressed promptly.
Background
The directive was issued following a fatal accident involving a Cessna 150D, where improper cable routing led to chafing and failure of the elevator control cable. The document highlights the risks associated with modifications that relocate the battery and stresses the need for adherence to safety protocols.
Safety notes
- Improper routing of battery cables can lead to electrical shorts and control cable failures, posing serious safety risks.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 150, F150, 152 & F152 Series Aeroplanes AD/CESSNA 150/42 Battery/Battery Contactor Cable Routing 11/88 DM Applicability: Aircraft model 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, A150K, A150L, A150M, F150G, F150H, F150J, F150K, F150L, F150M, FA150K, FA150L, FRA150L and FRA150M all serial numbers, which have undergone any modifications to relocate the battery from the firewall to the aft fuselage, and Model 150, 150A, 150B, 150C all serial numbers, which have undergone any modifications in which the battery has been moved from its location just aft of the baggage compartment aft bulkhead to any other aft position. Requirement: To prevent failure of the up elevator cable, perform the following: (a) Tie the “battery to battery contactor” cable to the lock pin which attaches the battery box cover to the battery box using either MIL-C-5649 cord, MS17821 or MS3367 tiedown strap to achieve a minimum of one inch clearance between the battery cable and the elevator up cable. (b) Visually inspect the battery cable and elevator cable for damage. Prior to next flight, repair any such damage found. Compliance: Within 25 hours time in service after 20 August 1988. Background: A recent fatal accident [FAA AD 88-15-06 Amendment 39-5977 refers] involving a Cessna 150D occurred after modification to relocate the battery box from the firewall to the aft fuselage. The up elevator control cable was found to have chafed against the battery to battery contactor cable such that the insulation on the latter cable was destroyed resulting in an electrical short circuit of the battery cable. This produced sufficient electrical resistance and subsequent heat to cause the up elevator cable to fail. Inspection of other aircraft with similar modifications indicates that this condition could develop in these aircraft.
What's in the Cessna 150 TCDS
A Type Certificate Data Sheet (TCDS) is the FAA's record of what an aircraft type was approved as. It is the source of truth for weights, seating, fuel and the rules the design was certified against. Expand any line to see what it means.