AD 50-04-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Superior Aircraft Company | V | Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 |
| aircraft | Superior Aircraft Company | V-2 | Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 |
Unsafe Condition
The teeth of the final pinion, P/N 10528, in the gear reduction train of the landing gear retraction motor have inadequate strength to sustain shock loads from abrupt reversal of the landing gear retraction switch and maladjusted limit switches, rendering the emergency extension system inoperative.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace gears 10528 and 10529 with gears 11520 and 11521, which have stronger teeth. Obtain the replacement gears from Superior Aircraft Co., University Airport, 2501 North Hillside, Wichita 25, Kansas.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at the next 100-hour inspection but not later than February 1, 1951
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Superior (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 not previously modified per Superior Service Bulletin No. 18
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Landing Gear Retraction Motor
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_50-04-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-04-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V...Show more Subject: Landing Gear Retraction Motor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Superior Aircraft Company Model: V | V-2 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 50-04-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-04-02 SUBJECT HEADING: Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-04-02 SUPERIOR (Culver): Applies to All Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 Not Previously Modified in Accordance With Superior Service Bulletin No. 18. Compliance required at the next 100-hour inspection but not later than February 1, 1951. The teeth of the final pinion, P/N 10528, in the gear reduction train of the landing gear retraction motor have inadequate strength to sustain the shock loads due to abrupt reversal of the landing gear retraction switch and to maladjusted limit switches. As stripping of these teeth makes the emergency extension system inoperative, gears 10528 and 10529 should be replaced with gears 11520 and 11521 which have stronger teeth and are obtainable from the Superior Aircraft Co., University Airport, 2501 North Hillside, Wichita 25, Kansas. (Superior Service Bulletin No. 18 dated November 19, 1947, covers this same subject.) This supersedes AD 48-05-02, and eliminates placard installation provisions. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_50-04-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-04-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V...Show more Subject: Landing Gear Retraction Motor Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Superior Aircraft Company Model: V | V-2 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: 50-04-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-04-02 SUBJECT HEADING: Airworthiness Directives; SUPERIOR (Culver) Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-04-02 SUPERIOR (Culver): Applies to All Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 Not Previously Modified in Accordance With Superior Service Bulletin No. 18. Compliance required at the next 100-hour inspection but not later than February 1, 1951. The teeth of the final pinion, P/N 10528, in the gear reduction train of the landing gear retraction motor have inadequate strength to sustain the shock loads due to abrupt reversal of the landing gear retraction switch and to maladjusted limit switches. As stripping of these teeth makes the emergency extension system inoperative, gears 10528 and 10529 should be replaced with gears 11520 and 11521 which have stronger teeth and are obtainable from the Superior Aircraft Co., University Airport, 2501 North Hillside, Wichita 25, Kansas. (Superior Service Bulletin No. 18 dated November 19, 1947, covers this same subject.) This supersedes AD 48-05-02, and eliminates placard installation provisions. FOOTER:
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.