AD 90-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 180 | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180A | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180B | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180C | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180D | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180E | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180F | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180G | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180H | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180J | Airworthiness Directives; CESSNA Model 180 Airplanes |
| aircraft | Cessna Aircraft Company | 180K | Airworthiness Directives; CESSNA Model 180 Airplanes |
Unsafe Condition
Undetected fuel loss and erroneous fuel gauging may occur after an inadvertent icing encounter due to over the wing (cabin) primary fuel vents.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard on the instrument panel within 100 hours time-in-service; modify or install fuel tank bladder with vent relocation if left fuel bladder is removed; alternate compliance may be approved by FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Model 180 airplanes (Serial Numbers 30000 thru 32487) equipped with over the wing (cabin) primary fuel vents.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Tank (Bladder)
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_90-21-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-21-08 Document Type: AD Final Rules Docket Number: 89-CE-08-AD Subject Heading: Airworthiness Directives; CESSNA Model 180 Airplanes Subject: Fuel Tank (Bladder) Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/13/1990 Make: Cessna Aircraft Company Model: 180 | 180A | 180B | 180C | 180D | 180E | 180F | 180G | 180H | 180J | 180K Product Type: Aircraft Product Subtype: Small 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: 90-21-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-CE-08-AD AMENDMENT: 39-6711 AD NUMBER: 90-21-08 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 180 Airplanes ACTION: SUMMARY: DATES: Effective November 13, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-21-08 CESSNA: Amendment 39-6711. Docket No. 89-CE-08-AD. Applicability: Applies to Model 180 airplanes (Serial Numbers 30000 thru 32487) equipped with over the wing (cabin) primary fuel vents certificated in any category. Compliance: Required as indicated unless already accomplished. To preclude undetected fuel loss on airplanes equipped with an over the wing (above cabin top) fuel vent tube, accomplish the following: (a) Within the next 100 hours time-in-service (TIS) after the effective date of this AD, fabricate and install the following placard on the instrument panel in full view of the pilot using letters at least 1/8 in. high; "CAUTION, UNDETECTED FUEL LOSS AND ERRONEOUS FUEL GAUGING MAY OCCUR AFTER AN INADVERTENT ICING ENCOUNTER." (b) When the left fuel bladder is removed for any purpose, modify or install a fuel tank (bladder) equivalent to Cessna Part Number 0726000-13 (fuel vent in the outboard end of the fuel tank container), and relocate the primary fuel vent opening to behind the left lift strut in accordance with Cessna Service Kit SK 180-6. (Under the wing primary fuel vents behind both the left and right wing lift struts are acceptable). (c) The placard specified in paragraph (a) of this AD is not required if the airplane has been modified per the requirements of paragraph (b) of this AD. NOTE 1: Fuel tank bladders and modifications may be obtained from (but not limited to) the following sources: 1. Aero Tire and Tank, Inc. 11219 Shady Trail Dallas, TX 75229 2. Aviation Fuel Cells International 5680 Shelby Drive Memphis, TN 38115 3. Floats and Fuel Cells 4010 Pilot Drive Suite 3 Memphis, TN 38118 4. Aviation Materials 4300 Swinnea Road Memphis, TN 38118 (d) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (e) The placard installation required by this AD is preventative maintenance and may be performed by the holder of a pilot certificate issued under FAR Part 61 subject to the limitations of FAR 43.3. The maintenance record entries required by FAR 43.9 and FAR 91.417 must be accomplished. (f) An alternate means of compliance with this AD may be used if approved by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Wichita, Kansas 67209. NOTE 2: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and send it to the Manager, Wichita Aircraft Certification Office. All persons affected by this directive may obtain copies of the documents referred to herein upon request to Cessna Aircraft Services, P.O. Box 1521, Wichita, Kansas 67201; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment (39-6711, AD 90-21-08) becomes effective on November 13, 1990. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_90-21-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-21-08 Document Type: AD Final Rules Docket Number: 89-CE-08-AD Subject Heading: Airworthiness Directives; CESSNA Model 180 Airplanes Subject: Fuel Tank (Bladder) Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/13/1990 Make: Cessna Aircraft Company Model: 180 | 180A | 180B | 180C | 180D | 180E | 180F | 180G | 180H | 180J | 180K Product Type: Aircraft Product Subtype: Small 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: 90-21-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-CE-08-AD AMENDMENT: 39-6711 AD NUMBER: 90-21-08 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 180 Airplanes ACTION: SUMMARY: DATES: Effective November 13, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-21-08 CESSNA: Amendment 39-6711. Docket No. 89-CE-08-AD. Applicability: Applies to Model 180 airplanes (Serial Numbers 30000 thru 32487) equipped with over the wing (cabin) primary fuel vents certificated in any category. Compliance: Required as indicated unless already accomplished. To preclude undetected fuel loss on airplanes equipped with an over the wing (above cabin top) fuel vent tube, accomplish the following: (a) Within the next 100 hours time-in-service (TIS) after the effective date of this AD, fabricate and install the following placard on the instrument panel in full view of the pilot using letters at least 1/8 in. high; "CAUTION, UNDETECTED FUEL LOSS AND ERRONEOUS FUEL GAUGING MAY OCCUR AFTER AN INADVERTENT ICING ENCOUNTER." (b) When the left fuel bladder is removed for any purpose, modify or install a fuel tank (bladder) equivalent to Cessna Part Number 0726000-13 (fuel vent in the outboard end of the fuel tank container), and relocate the primary fuel vent opening to behind the left lift strut in accordance with Cessna Service Kit SK 180-6. (Under the wing primary fuel vents behind both the left and right wing lift struts are acceptable). (c) The placard specified in paragraph (a) of this AD is not required if the airplane has been modified per the requirements of paragraph (b) of this AD. NOTE 1: Fuel tank bladders and modifications may be obtained from (but not limited to) the following sources: 1. Aero Tire and Tank, Inc. 11219 Shady Trail Dallas, TX 75229 2. Aviation Fuel Cells International 5680 Shelby Drive Memphis, TN 38115 3. Floats and Fuel Cells 4010 Pilot Drive Suite 3 Memphis, TN 38118 4. Aviation Materials 4300 Swinnea Road Memphis, TN 38118 (d) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (e) The placard installation required by this AD is preventative maintenance and may be performed by the holder of a pilot certificate issued under FAR Part 61 subject to the limitations of FAR 43.3. The maintenance record entries required by FAR 43.9 and FAR 91.417 must be accomplished. (f) An alternate means of compliance with this AD may be used if approved by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Wichita, Kansas 67209. NOTE 2: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and send it to the Manager, Wichita Aircraft Certification Office. All persons affected by this directive may obtain copies of the documents referred to herein upon request to Cessna Aircraft Services, P.O. Box 1521, Wichita, Kansas 67201; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment (39-6711, AD 90-21-08) becomes effective on November 13, 1990. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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