AD/CESSNA 400/112 Amdt 1 - Fuel Boost Pump Wiring

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Legislation au F2006B08299 In force Legislative Instrument

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AIRWORTHINESS DIRECTIVE


For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CESSNA 400/112 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.


 

Cessna 400 Series Aeroplanes

 

AD/CESSNA 400/112

Amdt 1


Fuel Boost Pump Wiring 11/2003 DM

 

 

Applicability: Model 441 aeroplanes, serial numbers 0001 through 0362 and 0698.

 

Requirement: 1. Inspect part number (P/N) 5718106-1 wire harnesses and fuel boost pump lead wires for chafing or damage in accordance with Cessna Conquest Service Bulletin (SB) CQB02-1 Revision 2, dated 7 October 2002.

 

Note 1: Prior accomplishment of the first or initial Requirement 1 inspection in accordance with SB CQB02-1R1 Revision 1 dated 22 April 2002, as specified in the original issue of AD/CESSNA 400/111, is considered acceptable for the first or initial inspection required by this Directive.

 

2.         If any wire harness P/N 5718106-1 is found chafed or damaged during the Requirement 1 inspections, replace the wire harness with wire harness P/N 5718106-6 in accordance with SB CQB02-1, Revision 2.

 

3.         If any fuel boost pump lead wires are found chafed or damaged during the Requirement 1 inspections either repair and protect the fuel pump leads or replace the fuel boost pump in accordance with SB CQB02-1, Revision 2.

 

4.         Install an improved design fuel boost pump (P/N 1C12-17 or an equivalent FAA approved P/N) or protect the fuel boost pump leads in accordance with SB CQB02-1, Revision 2 and install improved design wire harness P/N 5718106-6 in accordance with SB CQB02-1, Revision 2.

 

Note 2: The FAA defines an improved design fuel boost pump as one that has the pump lead wires protected in accordance with SB CQB02-1, Revision 2.

 

Note 3: Installing an improved design fuel pump and P/N 5718106-6 wire harness in both wing tanks terminates the Requirement 1 repetitive inspections of this Directive.

 

5.         Only fuel boost pumps that have been inspected to ensure that the pump leads have been protected in accordance with SB CQB02-1, Revision 2 and improved design wire harnesses P/N 5718106-6 may be installed on any aeroplane as a replacement part.

 

Note 4: FAA AD 2003-09-09 Amdt 39-13138 and FAA Alternate Method of Compliance Letter (FAA Small Airplane Directorate) dated 13 May 2003 refer.

 

Compliance: For Requirement 1:

 

  1. If not previously accomplished in accordance with AD/CESSNA 400/111 requirement 1 or AD/CESSNA 400/112 Requirement 1 - Within the next 25 hours time in service (TIS) after the effective date of this Directive and thereafter at intervals not exceeding 200 hours TIS until Requirement 3 is accomplished.

 

b.         If previously accomplished in accordance with AD/CESSNA 400/111 Requirement 1 or AD/CESSNA 400/112 Requirement 1 - Within the next 200 hours TIS after compliance with AD/CESSNA 400/111 Requirement 1 or AD/CESSNA 400/112 Requirement 1 and thereafter at intervals not exceeding 200 hours TIS until Requirement 3 is accomplished.

 

For Requirements 2 and 3 - Before further flight after completing the Requirement 1 inspection.

 

For Requirement 4 - Within the next 400 hours TIS after the effective date of this Directive.

 

For Requirement 5 - As of the effective date of this Directive. This Amendment becomes effective on 10 September 2003.

Background The United States Federal Aviation Administration (FAA) has received evidence of chafing and/or arcing of the electrical wiring leading to the fuel boost pump reservoir. Further investigation confirmed reports of chafing and/or arcing of the fuel boost pump wiring inside the fuel pump reservoir that supplies fuel to each engine.

 

AD/CESSNA 400/111 required a one-time inspection of the fuel boost pump wiring inside and outside the boost pump reservoir, and the repair or replacement of the wiring as necessary. The original issue of this Directive, which superseded AD/CESSNA 400/111, required repetitive inspections until the new design wiring harness are installed and the boost pumps either modified or replaced. These actions were intended to detect and correct chafing and/or arcing of boost pump wiring, which could result in ignition of explosive vapour within the fuel storage system.

 

This amendment clarifies what an improved design fuel pump is and requires pumps to be inspected before installation.

 

This original issue of this Airworthiness Directive became effective on 10 July 2003.


Jim Coyne

Delegate of the Civil Aviation Safety Authority 3 September 2003

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


The above AD is notified in the Commonwealth of Australia Gazette on 10 September 2003.

Overview

The Airworthiness Directive (AD) AD/CESSNA 400/112 Amendment 1, issued under the Civil Aviation Safety Regulations 1998 (CASR 1998) by the Civil Aviation Safety Authority (CASA) on 3 September 2003, aims to address safety concerns related to the chafing and arcing of electrical wiring in Cessna 400 series aeroplanes. The AD specifically targets Model 441 aeroplanes with serial numbers between 0001 through 0362 and 0698. The primary objective of this AD is to ensure the safety of these aircraft by requiring inspections, repairs, and replacements of certain components to prevent potential ignition of explosive vapour within the fuel storage system. This directive follows reports and investigations into wiring issues that could compromise the aircraft's safety. The AD was published in the Commonwealth of Australia Gazette on 10 September 2003, and its compliance timeline was set to ensure timely implementation of necessary safety measures.

Scope and Application

The Airworthiness Directive (AD) issued under subregulation 39.1 (1) of the Civil Aviation Safety Regulations 1998 (CASR 1998) pertains specifically to the Cessna 400 Series Aeroplanes, including model 441 aeroplanes with serial numbers ranging from 0001 to 0362 and 0698. This AD applies to the inspection, repair, and replacement of fuel boost pump wiring to prevent chafing and damage, which could potentially lead to unsafe conditions. The requirement encompasses the inspection and, if necessary, the replacement of specific wire harnesses and fuel boost pump lead wires in accordance with detailed instructions from Cessna Conquest Service Bulletin CQB02-1 Revision 2. The AD also stipulates the installation of improved design fuel boost pumps and wire harnesses, ensuring that these components meet specific safety standards. Compliance with the AD must be achieved within specified time intervals following the effective date of the directive, with particular emphasis on the inspection and replacement of wiring to mitigate the risk of ignition within the fuel storage system. This legislative instrument is applicable within the Commonwealth of Australia and is notified in the Commonwealth of Australia Gazette, ensuring its legal enforcement across relevant jurisdictions.

Key Provisions

The Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under section 39.1(1) of the Civil Aviation Safety Regulations 1998 (CASR) specifically addresses the Cessna 400 Series aeroplanes, serial numbers 0001 through 0362 and 0698. The AD mandates inspections and corrective actions to be taken to rectify an unsafe condition identified with the fuel boost pump wiring. According to the applicability section, the directive applies to the specified model and serial numbers of Cessna 400 aeroplanes. The requirement section stipulates that operators must inspect the wire harnesses and fuel boost pump lead wires for chafing or damage (Section 1), replace any damaged wire harnesses (Section 2), repair or replace damaged fuel boost pump lead wires (Section 3), and install an improved design fuel boost pump or protect the fuel boost pump leads (Section 4). It also states that only specific improved design components can be installed as replacements (Section 5). The obligations imposed by this AD on the parties it governs include conducting thorough inspections of the specified components, performing necessary repairs or replacements as identified, and ensuring that any new installations meet the improved design specifications. Operators must adhere to the timelines outlined in the compliance section, which mandates inspections and corrective actions at specific intervals after the effective date of the AD. Operators are required to follow the instructions provided in the Cessna Conquest Service Bulletin (SB) CQB02-1 Revision 2, dated 7 October 2002, to ensure proper inspection and maintenance procedures are carried out. Failure to comply with the requirements of this Airworthiness Directive may result in significant consequences. Civil Aviation Safety Regulations may impose penalties for non-compliance, including fines and potential grounding of the affected aircraft until the required actions are completed. Additionally, failure to adhere to these safety directives could lead to increased risk of aircraft accidents or incidents, thereby endangering the safety of passengers and crew. The maximum penalties for breaches are not explicitly stated in the AD but can be significant under the overarching aviation safety regulations.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.