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AD 2019-13-03 on AXP340

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scotthess View Drop Down
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    Posted: 23 Jul 2019 at 7:18am
Can't say I've seen too many radios installed this way....


2019-13-03 Trig Avionics Limited: Amendment 39-19676; Docket No. FAA-2018-1081; Product Identifier 2018-NE-39-AD.

(a) Effective Date

     This AD is effective August 27, 2019.

(b) Affected ADs

     None.

(c) Applicability

     This AD applies to:

     (1) Trig Avionics Limited TT31 Mode S transponders, part number (P/N) 00220-00-01 and P/N 00225-00-01, with a serial number (S/N) from 05767 to S/N 09715 inclusive, and Modification (Mod) Level 6 or below, installed.

     (2) Avidyne Corporation AXP340 Mode S transponders, P/N 200-00247-0000, also marked with Trig Avionics P/N 01155-00-01, with a S/N from 00801 to S/N 01377 inclusive, and Mod Level 0, installed.

     (3) BendixKing/Honeywell International KT74 Mode S transponders, P/N 89000007-002001, also marked with Trig Avionics P/N 01157-00-01, with a S/N from 01143 to S/N 02955 inclusive, and Mod Level 0, installed.

(d) Subject

     Joint Aircraft System Component (JASC) Code 3452, ATC transponder system.

(e) Unsafe Condition

     This AD was prompted by the discovery that the retaining cam that engages in the mounting tray may not withstand g-forces experienced during an emergency landing. The FAA is issuing this AD to prevent the transponder from detaching from the avionics rack. The unsafe condition, if not addressed, could result in damage to the fuel system or emergency evacuation equipment, or injury to aircraft occupants.

(f) Compliance

     Comply with this AD within the compliance times specified, unless already done.

(g) Required Actions

     (1) Within 90 days after the effective date of this AD, inspect the transponder installation to determine if the transponder is installed in a conventional aft-facing avionics rack.

     (2) If the transponder is installed in a conventional aft-facing avionics rack, no further action is required.

     (3) If the transponder is not installed in a conventional aft-facing avionics rack, remove the transponder before further flight.

     (4) Use the Accomplishment Instructions, paragraphs 4-8, to determine if the part is eligible for repair and re-installation, for the appropriate transponder, per Trig Avionics Limited Service Bulletin (SB) SUP/TT31/027, Issue 1.0, dated October 1, 2018; Trig Avionics Limited SB SUP/AXP340/002, Issue 1.0, dated October 1, 2018; or Trig Avionics Limited SB SUP/KT74/005, Issue 1.0, dated October 1, 2018.

(h) Installation Prohibition

     After the effective date of this AD, do not install an affected transponder on any aircraft, unless the transponder is installed in a conventional aft-facing avionics rack as defined in this AD.

(i) No Reporting Requirement

     No reporting requirement contained within the SBs referenced in paragraph (g)(4) of this AD is required by this AD.

(j) Definition

     For the purpose of this AD, a conventional aft-facing avionics rack is defined as an installation with the control panel oriented in opposition to the direction of flight (aft facing).

(k) Alternative Methods of Compliance (AMOCs)

     (1) The Manager, Boston ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO Branch, send it to the attention of the person identified in paragraph (l)(1) of this AD.

     (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office.

(l) Related Information

     (1) For more information about this AD, contact Min Zhang, Aerospace Engineer, Boston ACO Branch, FAA, 1200 District Avenue, Burlington, MA, 01803; phone: 781-238-7161; fax: 781-238-7199; email: min.zhang@faa.gov.

     (2) Refer to European Union Aviation Safety Agency (EASA) AD 2018-0247, dated November 13, 2018, for more information. You may examine the EASA AD in the AD docket on the internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2018-1081.

(m) Material Incorporated by Reference

     (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.

     (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.

     (i) Trig Avionics Limited Service Bulletin (SB) SUP/TT31/027, Issue 1.0, dated October 1, 2018.

     (ii) Trig Avionics Limited SB SUP/AXP340/002, Issue 1.0, dated October 1, 2018.

     (iii) Trig Avionics Limited SB SUP/KT74/005, Issue 1.0, dated October 1, 2018.

     (3) For Trig Avionics Limited service information identified in this AD, contact Trig Avionics Limited, Heriot Watt Research Park, Riccarton, Edinburgh EH14 4AP, United Kingdom; phone: +44 131 449 8810; fax: +44 131 449 8811; email: avionics.com">support@trig-avionics.com; internet: https://trig-avionics.com.

     (4) You may view this service information at FAA, Engine & Propeller Standards Branch, 1200 District Avenue, Burlington, MA, 01803. For information on the availability of this material at the FAA, call 781-238-7759.

     (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.




Edited by scotthess - 23 Jul 2019 at 7:23am
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Gary T View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary T Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 10:05am
Does not apply to my AXP340 since my S/N is 00194
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ddgates View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ddgates Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 3:16pm
I assume aft facing means the face of the transponder faces towards the tail?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ibraham Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 5:34pm
That sound right, how else would they be installed unless some are installed overhead?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ansond Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 6:47pm
Mine is in the affected S/Ns...

@Avidyne - does a "conventional aft-facing rack" include the center avionics stack in a Cirrus?

Thanks,

Doug
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Edited by ansond - 23 Jul 2019 at 6:48pm
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HenryM View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote HenryM Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 8:11pm
The AD defines aft-facing rack:

For the purpose of this AD, a conventional aft-facing avionics rack is defined as an installation with the control panel oriented in opposition to the direction of flight (aft facing).”

This is just about every installation I’ve seen in small GA planes. 
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Gring Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2019 at 8:21pm
I think the confusion comes from the word “conventional”
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ddgates Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jul 2019 at 6:12am
I guess if it is overhead it could fall and give you a subdural in a crash.
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