Commonwealth legislation

AD/AC-SNOW/21 - Vertical Tail Attachment Bracket

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of specified Ayres Thrush (Snow) Commander aeroplanes to inspect the vertical-tail front-spar attachment bracket for cracks, broken lugs/bolts or elongated holes and to replace any damaged bracket with aluminium part 40301T007 and close‑out plate 40309T003 per Ayres Service Bulletin SB-AG-32. Operators may instead replace the bracket without inspecting; inspections must be done within 50 hours and replacements within 100 hours after 6 January 1994.

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Current sections

Direct links to the current provisions in AD/AC-SNOW/21 - Vertical Tail Attachment Bracket.

AD/AC-SNOW/21 - Vertical Tail Attachment Bracket

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Ayres Thrush (Snow) Commander Series Aeroplanes

AD/AC-SNOW/21 Vertical Tail Attachment Bracket 1/94

Applicability: Models Serial Numbers

S2R 5000 through 5099, 1380R, and 1416R through 2583R

S2R-R1340 R1340-001 through R1340-030 (with or without DC suffix) S2R-R3S R3S-001 through R3S-011 (with or without DC suffix) S2R-R1820 R1820-001 through R1820-035 (with or without DC suffix) S2R-T11 T11-001 through T11-005 (with or without DC suffix)

S2R-T15 T15-001 through T15-029 (with or without DC suffix) and T27- 001 through T27-029,, and T27-031 (with or without DC suffix)

S2R-T34 6000 through 6049, T34-001 through T34-180, T34-190, T34-

191, and T34-192 (with or without DC suffix) T36-001 through T36-180 (with or without DC suffix); and T41-001 through T41- 180 (with or without DC suffix)

S2R-T45 T45-001 through T45-003 (with or without DC suffix) S2R-T65 T65-001 (with or without DC suffix)

S2R-HG-T65 T65-002 through T65-010 (with or without DC suffix) S2RG6 G6-101 through G6-112

S2R-G10 G10-101

Requirement: 1. Inspect the bracket that attaches the vertical tail front spar to the horizontal stabiliser for damage (cracks, broken lugs or bolts, or elongated holes) in accordance with the Accomplishment Instructions: I. Inspection, section of Ayres Service Bulletin SB-AG-32.

If any damage is found to the bracket during the inspection specified above, replace the bracket with an aluminium bracket, part number 40301T007, and install a new close out plate, part number 40309T003, in accordance with the Accomplishment Instructions: II. Repair, section of Ayres Service Bulletin SB-AG-32.

Replace the bracket with an aluminium bracket, part number 40301T007, and install a new close out plate, part number 40309T003, in accordance with Accomplishment Instructions: II. Repair, section of Ayres Service Bulletin SB-AG-32.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

The replacement may be accomplished instead of the inspection specified in Requirement 1 of this Directive provided it is accomplished at or prior to the 50 hours’ time in service compliance time.

Note: FAA AD 93-20-05 Amdt 39-8713 refers.

Compliance: 1. Within 50 hours’ time in service after 6 January 1994.

Unless already accomplished, within 100 hours’ time in service after 6 January 1994.

Background: There have been reports of broken lugs or bolts on the vertical tail attachment bracket on a significant number of aircraft.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/AC-SNOW/21 - Vertical Tail Attachment Bracket

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Ayres Thrush (Snow) Commander Series Aeroplanes

AD/AC-SNOW/21 Vertical Tail Attachment Bracket 1/94

Applicability: Models Serial Numbers

S2R 5000 through 5099, 1380R, and 1416R through 2583R

S2R-T15 T15-001 through T15-029 (with or without DC suffix) and T27- 001 through T27-029,, and T27-031 (with or without DC suffix)

S2R-T34 6000 through 6049, T34-001 through T34-180, T34-190, T34-

191, and T34-192 (with or without DC suffix) T36-001 through T36-180 (with or without DC suffix); and T41-001 through T41- 180 (with or without DC suffix)

S2R-T45 T45-001 through T45-003 (with or without DC suffix) S2R-T65 T65-001 (with or without DC suffix)

S2R-HG-T65 T65-002 through T65-010 (with or without DC suffix) S2RG6 G6-101 through G6-112

S2R-G10 G10-101

Replace the bracket with an aluminium bracket, part number 40301T007, and install a new close out plate, part number 40309T003, in accordance with Accomplishment Instructions: II. Repair, section of Ayres Service Bulletin SB-AG-32.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

The replacement may be accomplished instead of the inspection specified in Requirement 1 of this Directive provided it is accomplished at or prior to the 50 hours’ time in service compliance time.