- Effective
- October 3, 1995
- Published
- August 21, 1995 · 60 FR 43360–43362
- Amendment
- 39-9339
- Docket
- 95-CE-13-AD
- Issued as
- Final rule
Unofficial copy from the Federal Register text, document 95-20275. Only the govinfo PDF is the legal edition.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| Official PDF | 125 KB | c53092c1…dc3986a | 95-20275.pdf on govinfo.gov |
| Federal Register text | 11 KB | d2db088c…568bf42 | 95-20275.txt on federalregister.gov |
On this page
Summary
This amendment adopts a new airworthiness directive (AD) that applies to certain Fairchild Aircraft SA226 and SA227 series airplanes that utilize a direct current (DC) generator. This action requires relocating the left-hand (LH) and right-hand (RH) essential bus current limiters (225 amp) to the battery bus (main bus tie). A safety recommendation received by the Federal Aviation Administration (FAA) that details potential electrical failure problems on Fairchild Aircraft SA226 and SA227 series airplanes prompted this action. The actions specified by this AD are intended to prevent failure of the LH and RH essential bus when engine failure results in a blown generator current limiter, which could result in loss of airplane electrical power.
The airworthiness directive
95-17-09 Fairchild Aircraft: Amendment 39-9339; Docket No. 95-CE-13-AD.
Sec. 39.13 [Amended]
PDF page 22. Section 39.13 is amended by adding a new airworthiness directive to read as follows:
Applicability: The following model and serial number airplanes that utilize a direct current (DC) generator, certificated in any category.
------------------------------------------------------------------------ Models Serial Nos. ------------------------------------------------------------------------ SA226-T, SA226-AT, SA226-TC, and SA226-T(B)....... All SA227-AC, SA227-AT, SA227-BC, and SA227-TT........ 1 through 733. SA227-CC and SA227-DC............................. 784, and 790 through 883. ------------------------------------------------------------------------
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 use the authority provided in paragraph (c) of this AD to request approval from the FAA. This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any airplane from the applicability of this AD.
Compliance: Required within the next 2,000 hours time-in-service after the effective date of this AD, unless already accomplished.
To prevent failure of the left hand (LH) and right hand (RH) essential bus when engine failure results in a blown generator current limiter, which could result in loss of airplane electrical power, accomplish the following:
(a)
PDF page 3(a) Relocate the LH and RH essential bus current limiters (225 amp) to the battery bus (main bus tie) in accordance with Fairchild Aircraft Engineering Kit Drawing 27K82376, ``Current Limiter Rebusing Kit,'' as referenced in the following service bulletins (SB):
------------------------------------------------------------------------ SB Date Models affected ------------------------------------------------------------------------ 226-24-034.... September 29, 1994......... All affected SA226 models. 227-24-015.... September 29, 1994......... SA227-AD, SA227-AT, SA227- BC, and SA227-TT. CC7-24-002.... September 29, 1994......... SA227-CC and SA227-DC. ------------------------------------------------------------------------
(b)
PDF page 3(b) Special flight permits may be issued in accordance with Secs. 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.
(c)
PDF page 3(c) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Fort Worth Airplane Certification Office (ACO), FAA, 2601 Meacham Boulevard, Fort Worth, Texas 76193-0150. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Fort Worth ACO.
Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Fort Worth ACO.
(d)
PDF page 3(d) The modification required by this AD shall be done in accordance with Fairchild Aircraft Engineering Kit Drawing 27K82376, ``Current Limiter Rebusing Kit,'' as referenced in Fairchild Aircraft Service Bulletins 226-24-034, 227-24-015, and CC7-24-002, all Issued: September 29, 1994. 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 Fairchild Aircraft, P.O. Box 790490, San Antonio, Texas 78279-0490. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW., 7th Floor, suite 700, Washington, DC.
(e)
PDF page 3(e) This amendment (39-9339) becomes effective on October 3, 1995.
Issued in Kansas City, Missouri, on August 10, 1995. Gerald W. Pierce, Acting Manager, Small Airplane Directorate, Aircraft Certification Service.
Rule preamble
The FAA’s background, reasoning and cost estimate, published with the AD.
DatesPage 2
Effective October 3, 1995.
The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of October 3, 1995.
AddressesPage 2
Service information that applies to this AD may be obtained from Fairchild Aircraft, P.O. Box 790490, San Antonio, Texas 78279-0490; telephone (210) 824-9421. This information may also be examined at the FAA, Central Region, Office of the Assistant Chief Counsel, Attention: Rules Docket No. 95-CE-13-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC.
For further information contactPage 2
Mr. George R. Hash, Aerospace Engineer, FAA, Airplane Certification Office, 2601 Meacham Boulevard, Fort Worth, Texas 76193-0150; telephone (817) 222-5134; facsimile (817) 222-5959.
Supplementary informationPage 2
A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an AD that would apply to certain Fairchild Aircraft SA226 and SA227 series airplanes that utilize a DC generator was published in the Federal Register on March 16, 1995 (60 FR 14235). The action proposed to require relocating the LH and RH essential bus current limiters (225 amp) to the battery bus (main bus tie). Accomplishment of the proposed modification would be in accordance with Fairchild Aircraft Engineering Kit Drawing 27K82376, ``Current Limiter Rebusing Kit,'' as referenced in Fairchild Service Bulletin (SB) 226-24-034, SB 227-24-015, and SB CC7-24-002, all Issued: September 29, 1994.
Interested persons have been afforded an opportunity to participate in the making of this amendment. One comment was received in favor of the proposal and no comments were received regarding the FAA's estimate of the cost impact upon the public.
After careful review of all available information related to the subject presented above, the FAA has determined that air safety and the public interest require the adoption of the rule as proposed except for minor editorial corrections. The FAA has determined that these minor corrections will not change the meaning of the AD and will not add any additional burden upon the public than was already proposed.
The FAA estimates that 622 airplanes in the U.S. registry will be affected by this AD, that it will take approximately 4 workhours per airplane to accomplish the required action, and that the average labor rate is approximately $60 an hour. Parts cost approximately $98 per airplane. Based on these figures, the total cost impact of the AD on U.S. operators is estimated to be $210,236 or $338 per airplane. This figure is based on the assumption that no affected airplane owner/ operator has incorporated the required modification. Fairchild Aircraft has informed the FAA that parts have not been distributed to any owner/ operator of the affected airplanes.
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 copy of the final evaluation prepared for this action is contained in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39Page 2
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:
Adoption of the amendmentPage 2
1. The authority citation for part 39 continues to read as follows:
Authority: 49 USC 106(g), 40101, 40113, 44701.