{"id":"F2009L02663","name":"AD/PHZL/92 - Propeller Blade Counterweight Slug Attach Bolts","slug":"ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79716,"registerId":"commonwealth-F2009L02663-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - Hartzell","sectionType":"division","heading":"Propellers - Variable Pitch - Hartzell","content":"### Propellers - Variable Pitch - Hartzell\n\n| AD/PHZL/92 | Propeller Blade CounterweightSlug Attach Bolts | 8/2009 |\n| ---------- | ---------------------------------------------- | ------ |\n\n```html\n

Applicability:

Hartzell Propeller Inc. steel hub turbine propellers listed in Table 1 of this AD, with any counterweight slug attachment bolts, part number (P/N) B-3386-14H, LFC manufacturing lot 224, installed.

Note 1: These propellers are installed on, but not limited to, the aeroplanes listed in Table 1 of this AD.

Table 1

Propeller Model

Aeroplane Manufacturer

Aeroplane Model

HC-B3TN-5K

AERO COMMANDER

680T, 680V, 681

HC-B3TN-5DL, -5FL,
-5NL

AERO COMMANDER

690(A, B, C), 695A

HC-A3MVF-7B

AEROSPACE TECHNOLOGIES

N22B, N24A, N22S, N22C

HC-A3VF-7, -7B

AEROSPACE TECHNOLOGIES

N22B, N24A, N22S, N22C

HC-B5MP-3A, -3C

AIR TRACTOR

AT-502A

HC-B5MP-3C

AIR TRACTOR

AT-503, 602

HC-B5MA-3D(T)

AIR TRACTOR

AT-802

HC-B5MP-3F

AIR TRACTOR

AT-802

HC-B5MA-5A

ANTONOV

AN-38

HC-B3TN-5V

AYRES

S-2R

HC-B4TN-5NL, -5PL

AYRES

S-2R(-1340), -G(5, 6, 10), -R3S, -R1820, -T(6, 11, 15, 34, 45, 65)

HC-B5MP-3C

AYRES

S-2R(HG)-T65

HC-B3TN-3AE

AYRES

S-2R-T( )

HC-B3TN-5K

BAE (JETSTEAM)

137

HC-B4MP-3A

BEECH

1900C

HC-B4MP-3B

BEECH

300, 300LW

HC-B3TF-7A

BEECH

A36, A36TC

HC-B4MP-3C

BEECH

B300, B300C

HC-B4MN-5AL

CASA

C-212-CC, -CF

HC-B3TF-7A

CESSNA

206

HC-B3TF-7

CESSNA

402

HC-B3MN-3

CESSNA

208, 208A, 208B

HC-B3TN-3AEY, -3AF

CESSNA

208, 208A, 208B

HC-B3TF-7A

CESSNA

P210N

HC-B3TN-3AEY

DE HAVILLAND CANADA

DHC-3

HC-B4TN-5NL

DE HAVILLAND CANADA

DHC-3

HC-B5MA-3M

DE HAVILLAND CANADA

DHC-4

HC-B4TN-5ML

DORNIER

DO228-100, -101, -200,
-201, -202, -212

HC-B4TN-5L

DORNIER

DO228-200, -201, -202,
-212

\n```\n\n```html\n

HC-B5MA-3(J, M, C)

DOUGLAS

DC-3C

HC-B5MA-2

EMBRAER

EMB-314

HC-B4TN-5EL, -5HL,
-5KL

FAIRCHILD AIRCRAFT

SA-226T(B)

HC-B3TF-7, -7A

FLUG & FAHRZEUGWERKE AG

AS202/32TP

HC-B3TF-7A

FUJI

KM-2D (T-5)

HC-B5MP-5

GRUMMAN

S-2

HC-B5MA-5H

GRUMMAN

S-2F3AT

HC-3BTF-7A

MAULE

M-7-420, MX(T)-7-420

HC-B4TN-5DL, -5GL,
-5JL

MITSUBISHI

MU-2B-25A, -26A, -30,
-35A, -36A, -40 (MU-2P), -60 (MU-2N)

HC-B5MP-3(A)

NORD

262 FRAKES

HC-B5MP-3C

NORMAN AEROPLANE

NAC 6-65

HC-B5MP-3D

POLISH AVIATION (MIELEC)

M-28, -28B

HC-B5MP-3G

POLISH AVIATION (MIELEC)

M-28B

HC-B3TN-5U

PZL MIELEC

M18

HC-B4TN-5NL

PZL MIELEC

M18

HC-B5MP-5BL

PZL MIELEC

M18

HC-B5MP-3C

PZL MIELEC

M18, M18A, M18B

HC-B4MN-5B

ROCKWELL

OV-10 (LEFT SIDE)

HC-B4MN-5BL

ROCKWELL

OV-10 (RIGHT SIDE)

HC-B5MP-3A

SHORT BROTHERS

SD3-30

HC-B5MP-3C

SHORT BROTHERS

SD3-60-200,
SD3-SHERPA-200

HC-B3TF-7A

SIAI MARCHETTI (AERMACCHI)

F.260C, D

HC-B3TF-7A

SIAI MARCHETTI (AERMACCHI)

SM-1019

HC-B3TF-7A

SIAI MARCHETTI (VULCANAIR)

SF600 CANGURO

HC-B5MP-3(F)

THRUSH AIRCRAFT

S-2R-T660

HC-B3TN-5FL, -5NL

TWIN COMMANDER

690A, 690B, 690C

HC-B3TF-7A

VALMET

L-90TP

HC-B3TF-7A

VUCANAIR (PARTENAVIA)

AP68TP-300, -600

Requirement:

Identify and remove all propeller blade counterweight slug bolts, P/N B-3386-14H, LFC manufacturing lot 224, from service, and install serviceable bolts.

Use paragraphs 3.A.(1) through 3.A.(4)(b)5 of the Accomplishment Instructions of Hartzell Propeller Inc. ASB No. HC- ASB-61-313, Revision 2, dated 27 March 2009, to do the identification, removals from service, and installations.

For the purpose of this AD, a serviceable propeller blade counterweight slug bolt is a P/N B-3386-14H bolt with an LFC manufacturing lot other than lot 224.

Note 2: FAA AD 2009-10-14 Amdt 39-15910 dated 8 May 2009 refers.

Compliance:

Within 50 flight hours after the effective date of this AD, unless the actions have already been done.

This Airworthiness Directive becomes effective on 30 July 2009.

\n```\n\n| Background: | This AD results from two reports of failure of the bolts that attach the propeller blade counterweight slug, and separation of the counterweight slug which led to propeller vibration and damage to the propeller spinner. Investigation by Hartzell Propeller Inc. revealed that the bolts failed due to a bolt manufacturing defect. The issuing of this AD is intended to prevent separation of the propeller blade counterweight slug, which could lead to injury and damage to the aeroplane. |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n16 June 2009","sortOrder":0},{"sectionNumber":"AD/PHZL/92","sectionType":"part","heading":"AD/PHZL/92","content":"## AD/PHZL/92","sortOrder":1},{"sectionNumber":"Propeller Blade CounterweightSlug Attach","sectionType":"part","heading":"Propeller Blade CounterweightSlug Attach Bolts","content":"## Propeller Blade Counterweight \nSlug Attach Bolts","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with its stated purpose: it specifically targets P/N B-3386-14H bolts from LFC lot 224 on the listed Hartzell propellers and requires their identification and replacement within 50 flight hours using Hartzell's service instructions. It does not broaden the remedy beyond removing that defective lot or mandate unrelated modifications."},"complexity_factors":["Large number of affected propeller models and aircraft makes fleet identification and tracking more involved (Table 1 listings).","Action targets a specific part number and a single manufacturing lot (P/N B-3386-14H, LFC lot 224), requiring accurate parts/lot traceability.","Compliance requires use of the manufacturer's Accomplishment Instructions (Hartzell ASB HC-ASB-61-313 Rev 2), so operators must follow external technical procedures.","Short compliance window (within 50 flight hours) increases logistical pressure for inspections and replacements.","Replacement work is safety‑critical and must be carried out by certificated maintenance organisations, creating labour and scheduling costs.","Potential parts availability and supply-chain constraints for serviceable bolts may delay compliance.","Cross‑reference to FAA AD means international regulatory alignment and possible additional documentation or recordkeeping."],"plain_english_summary":"This Airworthiness Directive requires operators of aircraft with specified Hartzell variable‑pitch propellers to identify any propeller blade counterweight slug bolts P/N B‑3386‑14H from LFC manufacturing lot 224, remove those bolts from service, and install serviceable replacement bolts within 50 flight hours. CASA cites two bolt failures and Hartzell's investigation finding a manufacturing defect; the mechanical aim is to prevent counterweight separation, propeller vibration and spinner damage."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in a single bolt part number from one production lot. The scope remains precisely limited to the identified safety risk and has not expanded beyond the original defect investigation."},"complexity_factors":["Extensive tabular data listing 50+ propeller models and corresponding aircraft types across multiple manufacturers","Precise part number and manufacturing lot identification required (P/N B-3386-14H, LFC lot 224)","Cross-reference to external technical document (Hartzell ASB No. HC-ASB-61-313 Revision 2) for detailed accomplishment instructions","Conditional compliance language ('unless the actions have already been done')","Reference to corresponding FAA AD (2009-10-14) for additional context"],"plain_english_summary":"This AD requires operators of certain Hartzell steel‑hub turbine propellers to immediately inspect for and replace bolts (P/N B-3386-14H, LFC lot 224) that have a manufacturing defect. Failed bolts can let counterweight slugs separate, causing severe vibration, propeller damage, and risk to aircraft and people. Replace affected bolts with serviceable ones within 50 flight hours after 30 July 2009."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts","history":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts/history","analysis":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts/analysis","conflicts":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts/conflicts","importantCases":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts/important-cases","documents":"/api/acts/ad-phzl-92-propeller-blade-counterweight-slug-attach-bolts/documents"}}