AD 73-12-02

final rule
Data completeness: 70%

DOWTY ROTOL Model (c)R186/4-30-4/16 Propellers

AD Number
73-12-02
Status
final_rule
Effective Date
Product Category
propeller
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Dowty Propellers (c) R186/4-30-4/ DOWTY ROTOL Model (c)R186/4-30-4/16 Propellers

Unsafe Condition

Cracking of the propeller hub front wall

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

Required Actions

Strengthen the propeller hub and hub driving center by incorporating Modification No. (c) VP.2388, Revision 3, in accordance with Dowty Rotol Service Bulletin No. 61-604 (Rev. 2) dated November 24, 1971, or an FAA-approved equivalent.

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

Compliance Time

Within the next 200 hours' time in service after the effective date of this AD, or prior to the accumulation of 8,000 hours total time in service, whichever occurs later

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

Affected Aircraft

Dowty Propellers Model (c)R186/4-30-4/16 propellers not modified per Modification No. (c) VP.2388 (Rev. 3), installed on Armstrong Whitworth Argosy Type A.W. 650 Series 101 airplanes

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.

View Official Source ↗ Find More ADs for Dowty Propellers (c) R186/4-30-4/

Related Airworthiness Directives

72-14-01

final rule

DOWTY ROTOL, LTD Models (c)R130/4-20-4/12E, (c)R186/4-30-4/16, (c)R187/4-30-4/18, (c)R193/4-30-4/50, (c)R184/4-30-4/50, (c)R259/4-40-4.5/17, (c)R148/4-20-4/21E, (c)R175/4-30-4/13E, (c)R179/4- 20-4/33, (c)R257/4-30-4/60, (c)R245/4-40-4.5/13, and (c)R209/4-40-4.5/2 Propellers

Unsafe Condition: Blade Bearing Retaining Bolts

Effective: Jul 22, 1972 Category: propeller

72-07-07

final rule

DOWTY ROTOL applies to all propellers with blade root sizes Nos. 20 and 30

Unsafe Condition: Blade Bearing

Effective: Mar 29, 1972 Category: propeller

69-23-04

final rule

DOWTY ROTOL Models (c) R.130/4-20 - 4/12E, (c) R.148/4-20 - 4/21E, (c) R.186/4-30 - 4/16, and (c) R.175/4-30 - 4/13E Propellers

Unsafe Condition: Cylinders

Effective: Dec 11, 1969 Category: propeller

67-10-03

final rule

DOWTY-ROTOL PROPELLERS Models (c) R.186/4-30-4/16, (c) R.175/4-30-4/13E, (c) R.130/4-20-4/12E, and (c) R.148/4-20-4/21E Propellers

Unsafe Condition: Cylinders

Effective: Apr 1, 1968 Category: propeller

View all Dowty Propellers ADs →