AD 85-25-10

final rule

Airworthiness Directives; Cessna Models S550 and 552 Airplanes

AD Number
85-25-10
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Cessna Aircraft Company 552 Airworthiness Directives; Cessna Models S550 and 552 Airplanes
aircraft Cessna Aircraft Company S550 Airworthiness Directives; Cessna Models S550 and 552 Airplanes

Unsafe Condition

Hazardous accumulation of ice on the wing leading edge and horizontal stabilizer during flight in icing conditions.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Install a placard on the instrument panel stating 'FLIGHT INTO KNOWN OR FORECAST ICING PROHIBITED', revise the Airplane Flight Manual to include the prohibition, inspect and modify the fluid ice protection system for inboard and outboard wings and horizontal stabilizer per specified service letters, and report defects within 5 days. Alternate compliance may be approved.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

A. Prior to further flight; B. Within the next 15 flight hours or 15 days after the effective date; C. Within the next 25 flight hours or 30 days after the effective date; D. Within 5 days after the required inspection.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Cessna Models S550 (unit numbers 0001-0048, 0051-0075, 0077, 0079) and 552 (-0001 to -0015).

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Placard - Icing Conditions

Applicability Source Text

Show captured applicability text from the source AD
AD Final Rules - DRS_85-25-10.html
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AD Number:
85-25-10
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Cessna Models S550 and 552 Airplanes
Subject:
Placard - Icing Conditions
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/11/1986
Make:
Cessna Aircraft Company
Model:
552 | S550
Product Type:
Aircraft
Product Subtype:
Small/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Superseded AD: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Superseded By: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: 85-25-10
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5224

AD NUMBER:   85-25-10

SUBJECT HEADING:   Airworthiness Directives; Cessna Models S550 and 552 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective February 11, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-25-10 CESSNA AIRCRAFT COMPANY: Amendment 39-5224. Applies to Cessna Model S550 and 552 airplanes, with unit numbers identified below, certificated in any category.

MODEL	UNIT NUMBERS
S550	0001 thru 0048, 0051 thru 0075, 0077, and 0079
552	-0001 thru -0015

Compliance is required as indicated, unless already accomplished.

To prevent hazardous accumulation of ice on the wing leading edge and horizontal stabilizer during flight in icing conditions, accomplish the following:

A. Prior to further flight:

1. Fabricate and install on the instrument panel, in clear view of the pilot, the following placard, using letters of a minimum of 0.10 inch in height: "FLIGHT INTO KNOWN OR FORECAST ICING PROHIBITED," and operate the airplane accordingly.

2. Revise the Airplane Flight Manual, Section II, Operating Limitations - Operations Authorized to read: "This airplane is approved for day and night, VFR, IFR flight. Flight into known or forecast icing conditions prohibited." This may be accomplished by inserting a copy of this AD in the Airplane Flight Manual.

B. Within the next 15 flight hours or 15 days after the effective date of this AD, whichever occurs first, inspect and modify, as necessary, the fluid ice protection system left and right inboard wing installation in accordance with Accomplishment Instruction A. of Cessna Alert Service Letter SLAS550-30-05, dated December 17, 1985.

C. Within the next 25 flight hours or 30 days after the effective date of this AD, whichever occurs first, inspect and modify, as necessary, the fluid ice protection system left and right outboard wing and horizontal stabilizer installations in accordance with Accomplishment Instructions B. and C. of Cessna Alert Service Letter SLAS550-30-05, dated December 17, 1985.

D. Within 5 days after the required inspection, report any defects found to the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

E. The requirements of paragraphs A.1. and A.2., above, may be accomplished by the holder of a pilot certificate issued under Part 61 of the Federal Aviation Regulations (FAR) on any airplanes owned or operated by him. The person accomplishing these actions must make the appropriate aircraft maintenance record entry as prescribed by FAR 91.173.

F. The requirements of paragraphs A.1. and A.2., above, are terminated upon the accomplishment of paragraphs B. and C. of this AD.

G. Airplanes may be flown in accordance with FAR 21.197 and 21.199 to a location where the inspection/modification requirements of the AD can be accomplished.

H. Alternate means of compliance with this AD which provides an acceptable level of safety may be used if approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Cessna Aircraft Company, P.O. Box 7704, Wichita, Kansas 67277. These documents also may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Wichita Aircraft Certification Office, FAA, Central Region, 1803 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas.

This amendment becomes effective February 11, 1986, as to all persons, except those persons to whom it was made immediately effective by priority letter AD 85-25-10, issued December 17, 1985.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_85-25-10.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
85-25-10
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Cessna Models S550 and 552 Airplanes
Subject:
Placard - Icing Conditions
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/11/1986
Make:
Cessna Aircraft Company
Model:
552 | S550
Product Type:
Aircraft
Product Subtype:
Small/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: 85-25-10
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5224

AD NUMBER:   85-25-10

SUBJECT HEADING:   Airworthiness Directives; Cessna Models S550 and 552 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective February 11, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-25-10 CESSNA AIRCRAFT COMPANY: Amendment 39-5224. Applies to Cessna Model S550 and 552 airplanes, with unit numbers identified below, certificated in any category.

MODEL	UNIT NUMBERS
S550	0001 thru 0048, 0051 thru 0075, 0077, and 0079
552	-0001 thru -0015

Compliance is required as indicated, unless already accomplished.

To prevent hazardous accumulation of ice on the wing leading edge and horizontal stabilizer during flight in icing conditions, accomplish the following:

A. Prior to further flight:

1. Fabricate and install on the instrument panel, in clear view of the pilot, the following placard, using letters of a minimum of 0.10 inch in height: "FLIGHT INTO KNOWN OR FORECAST ICING PROHIBITED," and operate the airplane accordingly.

2. Revise the Airplane Flight Manual, Section II, Operating Limitations - Operations Authorized to read: "This airplane is approved for day and night, VFR, IFR flight. Flight into known or forecast icing conditions prohibited." This may be accomplished by inserting a copy of this AD in the Airplane Flight Manual.

B. Within the next 15 flight hours or 15 days after the effective date of this AD, whichever occurs first, inspect and modify, as necessary, the fluid ice protection system left and right inboard wing installation in accordance with Accomplishment Instruction A. of Cessna Alert Service Letter SLAS550-30-05, dated December 17, 1985.

C. Within the next 25 flight hours or 30 days after the effective date of this AD, whichever occurs first, inspect and modify, as necessary, the fluid ice protection system left and right outboard wing and horizontal stabilizer installations in accordance with Accomplishment Instructions B. and C. of Cessna Alert Service Letter SLAS550-30-05, dated December 17, 1985.

D. Within 5 days after the required inspection, report any defects found to the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

E. The requirements of paragraphs A.1. and A.2., above, may be accomplished by the holder of a pilot certificate issued under Part 61 of the Federal Aviation Regulations (FAR) on any airplanes owned or operated by him. The person accomplishing these actions must make the appropriate aircraft maintenance record entry as prescribed by FAR 91.173.

F. The requirements of paragraphs A.1. and A.2., above, are terminated upon the accomplishment of paragraphs B. and C. of this AD.

G. Airplanes may be flown in accordance with FAR 21.197 and 21.199 to a location where the inspection/modification requirements of the AD can be accomplished.

H. Alternate means of compliance with this AD which provides an acceptable level of safety may be used if approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Cessna Aircraft Company, P.O. Box 7704, Wichita, Kansas 67277. These documents also may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Wichita Aircraft Certification Office, FAA, Central Region, 1803 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas.

This amendment becomes effective February 11, 1986, as to all persons, except those persons to whom it was made immediately effective by priority letter AD 85-25-10, issued December 17, 1985.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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