AD 75-05-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | 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.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.