AD 93-01-13

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AD Number:
93-01-13
Document Type:
AD Final Rules
Docket Number:
92-NM-236-AD
Subject Heading:
Airworthiness Directives; FOKKER Model F27 Series Airplanes
Subject:
Wheel Well Fuel Leakage
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/05/1993
Make:
Fokker Services
Model:
F27 Mark 100 | F27 Mark 200 | F27 Mark 300 | F27 Mark 400 | F27 Mark 500 | F27 Mark 600 | F27 Mark 700
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 93-01-13
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   92-NM-236-AD

AMENDMENT:   39-8467

AD NUMBER:   93-01-13

SUBJECT HEADING:   Airworthiness Directives; FOKKER Model F27 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective February 5, 1993.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
93-01-13 FOKKER: Amendment 39-8467. Docket 92-NM-236-AD.
Applicability: Model F27 series airplanes; except Model F27 Mark 050 series airplanes; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent uncontrolled fuel leakage into the wheel well, accomplish the following:

(a) Within 30 days after the effective date of this AD, perform a visual inspection to detect chafing, scratches, or dents on the fuel lines on the left- and right-hand nacelles, in accordance with Part 1 of the Accomplishment Instructions of Fokker Service Bulletin F27/28-61, dated September 3, 1992.

(b) If no chafing, scratches, or dents are found during the inspection required by paragraph (a) of this AD, the fuel line may remain installed. However, within 100 hours time-in-service after the effective date of this AD, perform a visual inspection for clearances between the fuel line and the landing gear parts, in accordance with Part 2 of the Accomplishment Instructions of Fokker Service Bulletin F27/28-61, dated September 3, 1992; and accomplish either paragraph (b)(1) or (b)(2) of this AD, as applicable.

(1) If the clearance between the fuel line and the landing gear parts is less than 0.25 inch, prior to further flight, adjust the landing gear components to achieve a minimum clearance of 0.25 inch, in accordance with the service bulletin.

(2) If the clearance between the fuel line and the landing gear parts is 0.25 inch or greater, no further action is required by this AD.
(c) If any chafing or scratches are found during the inspection required by paragraph (a) of this AD, prior to further flight, accomplish both paragraphs (c)(1) and (c)(2) of this AD:

(1) Measure the damage depth and accomplish either paragraph (c)(1)(i), (c)(1)(ii,) or (c)(1)(iii) of this AD, as applicable.

(i) If the depth of chafing or scratch damage is equal to or greater than 0.009 inch, prior to further flight, replace the damaged fuel line, in accordance with Chapter 28-00-00 of the Airplane Maintenance Manual.

(ii) If the depth of chafing or scratch damage is 0.004 inch or more, but less than 0.009 inch, re-inspect the damaged fuel line in accordance with paragraph (a) of this AD thereafter at intervals not to exceed 10 hours time-in-service; and replace the damaged fuel line within 50 hours time-in- service after the effective date of this AD, in accordance with Chapter 28-00-00 of the Airplane Maintenance Manual.

(iii) If the depth of chafing or scratch damage is less than 0.004 inch, the fuel line may remain in place.

(2) Perform a visual inspection for clearances between the fuel line and the landing gear parts, in accordance with Part 2 of the Accomplishment Instructions of Fokker Service Bulletin F27/28-61, dated September 3, 1992, and accomplish either paragraph (c)(2)(i) or (c)(2)(ii) of this AD, as applicable.

(i) If the clearance between the fuel line and the landing gear parts is less than 0.25 inch, prior to further flight, adjust the landing gear components to achieve a minimum clearance of 0.25 inch, in accordance with the service bulletin.

(ii) If the clearance between the fuel line and the landing gear parts is 0.25 inch or greater, no further action is required by this AD.

(d) If any dent is found during the inspection required by paragraph (a) of this AD, prior to further flight, accomplish both paragraphs (d)(1) and (d)(2) of this AD:

(1) Measure the damage depth and accomplish either paragraph (d)(1)(i) or (d)(1)(ii) of this AD, as applicable.

(i) If the depth of the dent is equal to or greater than 0.1 inch, prior to further flight, replace the dented fuel line, in accordance with Chapter 28-00-00 of the Airplane Maintenance Manual.

(ii) If the depth of the dent is less than 0.1 inch, the fuel line may remain installed.

(2) Perform a visual inspection for clearances between the fuel line and the landing gear parts, in accordance with Part 2 of the Accomplishment Instructions of Fokker Service Bulletin F27/28-61, dated September 3, 1992; and accomplish either paragraph (d)(2)(i) or (d)(2)(ii) of this AD, as applicable.

(i) If the clearance between the fuel line and the landing gear parts is less than 0.25 inch, prior to further flight, adjust the landing gear components to achieve a minimum clearance of 0.25 inch, in accordance with the service bulletin.

(ii) If the clearance between the fuel line and the landing gear parts is 0.25 inch or greater, no further action is required by this AD.

(e) 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, Standardization Branch, ANM-113, 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, Standardization Branch.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch.

(f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

(g) The inspections, replacement, and adjustment shall be done in accordance with Fokker Service Bulletin F27/28-61, dated September 3, 1992. 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 Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. 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.

(h) This amendment becomes effective on February 5, 1993.

FOOTER: