# AD 98-22-09: Water Heater Control Thermostat - Type: Airworthiness directive - Status: Current - Products: Dassault FALCON 2000 - Effective: December 2, 1998 - Published: October 28, 1998, 63 FR 57580–57582 - Issued as: Final rule - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-10856 - Docket: 98-NM-184-AD - Registered aircraft: 153 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/3c/81/3c81e4a3be348c701fb31b875116ffe582cc54dfbdc9d099d66f0e8d21cbe7c8 (from https://www.govinfo.gov/content/pkg/FR-1998-10-28/pdf/98-28537.pdf) - Federal Register: https://www.federalregister.gov/documents/1998/10/28/98-28537/airworthiness-directives-dassault-model-falcon-2000-series-airplanes - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/435224217FABABF686256A1F0070D6A1.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/98-22-09 ## Summary This amendment adopts a new airworthiness directive (AD), applicable to certain Dassault Model Falcon 2000 series airplanes, that requires modification of the front galley and rear lavatory water heaters. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the water heater control thermostat and the associated electrical relay, which could lead to overheating of the water and damage to the adjacent wiring, and consequent smoke and fumes in the passenger cabin and possible injury to the flight crew and passengers. ## The airworthiness directive 98-22-09 DASSAULT AVIATION: Amendment 39-10856. Docket 98-NM-184-AD. Applicability: Model Falcon 2000 series airplanes equipped with BFGoodrich water heaters, part number (P/N) 8921082G2, or Dassault Aviation Falcon Jet P/N 770224-501; certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent failure of the water heater control thermostat and the associated electrical relay, which could lead to overheating of the water and damage to the adjacent wiring, and consequent smoke and fumes in the passenger cabin and possible injury to the flight crew and passengers, accomplish the following: (a) Within 7 months or 330 flight hours after the effective date of this AD, whichever occurs first, modify the water heaters for the front galley and rear lavatory, in accordance with the Accomplishment Instructions of Dassault Aviation Service Bulletin F2000-115 (F2000-38-4), dated December 17, 1997. NOTE 2: The Dassault service bulletin references BFGoodrich Service Bulletin SB8921082G2-38-2, dated February 10, 1998, as an additional source of service information for accomplishment of the modification. (b) As of the effective date of this AD, no person shall install on anyairplane a BFGoodrich water heater having P/N 8921082G2 or a Dassault Aviation Falcon Jet water heater having P/N 770224-501. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116. NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116. (d) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (e) The modification shallbe done in accordance with Dassault Aviation Service Bulletin F2000-115 (F2000-38-4), dated December 17, 1997. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Dassault Falcon Jet, P.O. Box 2000, South Hackensack, New Jersey 07606. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. NOTE 4: The subject of this AD is addressed in French airworthiness directive 97-185-003(B)R1, dated November 19, 1997. (f) This amendment becomes effective on December 2, 1998. ## Rule preamble ### Supplementary information A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain Dassault Model Falcon 2000 series airplanes was published in the Federal Register on August 26, 1998 (63 FR 45417). That action proposed to require modification of the front galley and rear lavatory water heaters. Comments Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were submitted in response to the proposal or the FAA's determination of the cost to the public. Conclusion The FAA has determined that air safety and the public interest require the adoption of the rule as proposed. Cost Impact The FAA estimates that 23 airplanes of U.S. registry will be affected by this AD, that it will take approximately 2 work hours per airplane to accomplish the required modification, and that the average labor rate is $60 per work hour.Required parts will cost approximately $240 per airplane. Based on these figures, the cost impact of the modification required by this AD on U.S. operators is estimated to be $8,280, or $360 per airplane. The cost impact figure discussed above is based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. Regulatory Impact The regulations adopted herein will not have substantial direct effects on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. For the reasons discussed above, I certify that this action (1) is not a significant regulatory action under Executive Order 12866; (2) is not a significant rule under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39 - AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 39.13 [Amended] 2. Section 39.13 is amended by adding the following new airworthiness directive: ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A50NM](https://openairdocs.org/tcds/A50NM): Dassault Aviation; names 1 of 2 models: FALCON 2000 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 153 (153 by airframe model, 0 by engine model) - Makers: Dassault 153 Models with the most aircraft: - [Dassault FALCON 2000](https://openairdocs.org/model/dassault-falcon-2000): 153 aircraft (airframe model) All 1 models: https://openairdocs.org/ad/98-22-09/models.md Every aircraft: https://openairdocs.org/ad/98-22-09/aircraft.md ## Related documents - [Proposed rule 98-NM-184-AD](https://openairdocs.org/proposed/98-NM-184-AD): Notice of proposed rulemaking (NPRM), published Aug 26, 1998 Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.