AD 75-05-07

final rule

Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation System (Magnetic Stabilized Compass) Units

AD Number
75-05-07
Status
final_rule
Effective Date
Product Category
appliance
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft King Radio Corporation Navigation System Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation System (Magnetic Stabilized Compass) Units
appliance King Radio Corporation Navigation System Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation System (Magnetic Stabilized Compass) Units

Unsafe Condition

The unmodified Model KCS-55 Pictorial Navigation System units (Gyro Model KG-102 and Indicator Models KI-525) may have insufficient stabilization or alignment, leading to potential inaccuracies in heading indication during flight.

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

Required Actions

Within 25 hours' time in service after the effective date, check if the system is installed. If installed, verify if the KI-525 Indicator and KG-102 Gyro serial numbers are within specified ranges and modified as Mod 1 and Mod 6. If unmodified, placard the instrument panel to restrict usage. By November 15, 1975, replace unmodified units with modified versions per specified service bulletins.

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

Compliance Time

within 25 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

King Radio Corporation Model KCS-55 Pictorial Navigation System units: Gyro Model KG-102, Part Number 060-0011-00, Serial Numbers 1000 to 1999 and all serial numbers preceded by 'P'; Indicator Models KI-525, Part Number 066-3029-00/01, Serial Numbers 1000 to 1999 and all serial numbers preceded by 'P'.

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

Federal Register Abstract

Navigation System

Applicability Source Text

Show captured applicability text from the source AD
AD Final Rules - DRS_75-05-07.html
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AD Number:
75-05-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation Sys...Show more
Subject:
Navigation System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/28/1975
Make:
King Radio Corporation
Model:
Navigation System
Product Type:
Appliance
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 75-05-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2100

AD NUMBER:   75-05-07

SUBJECT HEADING:   Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation System (Magnetic Stabilized Compass) Units

ACTION:  

SUMMARY:  

DATES:   Effective February 28, 1975.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
75-05-07 KING RADIO CORPORATION: Amendment 39-2100. Applies to Model KCS-55 Pictorial Navigation System (magnetic stabilized compass) units, specifically the Gyro Model KG-102 ( ), Part Number 060-0011-0, Serial Numbers 1000 to 1999 and all serial numbers preceded by the letter "P" and Indicator Models KI-525 ( ), Part Number 066-3029-00/01, Serial Numbers 1000 to 1999 and all serial numbers preceded by the letter "P". The Model KCS-55 systems may be installed on various types of aircraft.

Compliance: Required as indicated, unless already accomplished.

A) Within the next 25 hours' time in service after the effective date of this AD, check the aircraft compass system installed or the aircraft permanent maintenance record to determine if the KCS-55 pictorial navigation system is installed on the aircraft.

B) If, as a result of determination required in Paragraph A of this AD, a KCS-55 pictorial navigation system is installed, check the indicator KI-525 ( ) to determine if the serial number falls within those noted in the applicability statement and if the unit has been modified and identified as Mod 1. Also, check the KG 102 gyro and determine if the serial number falls within those noted in the applicability statement and that the unit has been modified and identified as Mod 6. If both units are so identified with the modification number, make an appropriate entry in the aircraft records indicating compliance with this AD.

C) If as a result of the determinations required by Paragraphs A and B of this AD unmodified KCS-55 Pictorial Navigation System units are installed, prior to further flight, install a placard on the instrument panel in clear view of the pilot which indicates:

"KCS-55 PICTORIAL NAVIGATION SYSTEM IS NOT TO BE USED FOR PRIMARY HEADING OR IFR FLIGHT IF IT IS SOLE GYROSCOPIC HEADING SOURCE" and operate the aircraft in accordance with this limitation.

D) On or before November 15, 1975, replace any KCS-55 pictorial navigation system units which fall within the Part Number and Serial Number designations set forth in the applicability statement with modified units which are identified in accordance with King Alert Service Bulletins KI 525-1 and KG 102-6 dated January 2, 1975, or subsequent revisions, as Mod 1 and Mod 6 respectively. When this paragraph has been complied with, Paragraph C of this AD is no longer applicable.

E) Any alternative means of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective February 28, 1975.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_75-05-07.html
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Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
75-05-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation Sys...Show more
Subject:
Navigation System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/28/1975
Make:
King Radio Corporation
Model:
Navigation System
Product Type:
Appliance
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 75-05-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2100

AD NUMBER:   75-05-07

SUBJECT HEADING:   Airworthiness Directives; KING RADIO CORPORATION: Applies to Model KCS-55 Pictorial Navigation System (Magnetic Stabilized Compass) Units

ACTION:  

SUMMARY:  

DATES:   Effective February 28, 1975.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
75-05-07 KING RADIO CORPORATION: Amendment 39-2100. Applies to Model KCS-55 Pictorial Navigation System (magnetic stabilized compass) units, specifically the Gyro Model KG-102 ( ), Part Number 060-0011-0, Serial Numbers 1000 to 1999 and all serial numbers preceded by the letter "P" and Indicator Models KI-525 ( ), Part Number 066-3029-00/01, Serial Numbers 1000 to 1999 and all serial numbers preceded by the letter "P". The Model KCS-55 systems may be installed on various types of aircraft.

Compliance: Required as indicated, unless already accomplished.

A) Within the next 25 hours' time in service after the effective date of this AD, check the aircraft compass system installed or the aircraft permanent maintenance record to determine if the KCS-55 pictorial navigation system is installed on the aircraft.

B) If, as a result of determination required in Paragraph A of this AD, a KCS-55 pictorial navigation system is installed, check the indicator KI-525 ( ) to determine if the serial number falls within those noted in the applicability statement and if the unit has been modified and identified as Mod 1. Also, check the KG 102 gyro and determine if the serial number falls within those noted in the applicability statement and that the unit has been modified and identified as Mod 6. If both units are so identified with the modification number, make an appropriate entry in the aircraft records indicating compliance with this AD.

C) If as a result of the determinations required by Paragraphs A and B of this AD unmodified KCS-55 Pictorial Navigation System units are installed, prior to further flight, install a placard on the instrument panel in clear view of the pilot which indicates:

"KCS-55 PICTORIAL NAVIGATION SYSTEM IS NOT TO BE USED FOR PRIMARY HEADING OR IFR FLIGHT IF IT IS SOLE GYROSCOPIC HEADING SOURCE" and operate the aircraft in accordance with this limitation.

D) On or before November 15, 1975, replace any KCS-55 pictorial navigation system units which fall within the Part Number and Serial Number designations set forth in the applicability statement with modified units which are identified in accordance with King Alert Service Bulletins KI 525-1 and KG 102-6 dated January 2, 1975, or subsequent revisions, as Mod 1 and Mod 6 respectively. When this paragraph has been complied with, Paragraph C of this AD is no longer applicable.

E) Any alternative means of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective February 28, 1975.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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