Public Training by Mark Wilson Michael Heusser Peter Pupator Anchorage ACO, Alaska FSRO

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PublicTraining by Mark Wilson Michael
Heusser Peter PupatorAnchorage ACO, Alaska FSRO
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Data Required for Major/Minor Type Design
Determination?
Supply data to support determination. - Why the
change NOT part of type design. - Why the change
does NOT effect the critical five. - Why the
change is NOT appreciable. - Why the change does
NOT effect safety. - Why the change is NOT at
product level.Can the modification be designed
such that it is a Minor change to Type Design?
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Data Required for Major Alteration.
If it is a Minor Change to Type Design, and a
Major Alteration, the IA must still supply
approved data (manuals, analysis,
photos).Installation is to the approved
data.Use checklist available to determine if
all regulations have been captured.A Minor
Change to Type Design (Major Alteration) still
requires data for compliance to regulations!
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Data Required for Major Alteration cont

• Instructions for Continued Airworthiness.-
  Instruction of removal, installation.- Parts
  list.- Special Instructions.- Scheduled
  (annual) Inspection criteria.- Unscheduled (Hard
  Landing) Inspection criteriaInformation on the
  future servicing of the modification by another
  mechanic.

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Flight Manual Supplements
If the aircraft HAS a Flight Manual, AND the
modification changes the FAA Approved sections
(Limitation, Procedures..) the a Flight Manual
Supplement MUST be approved by the ACO.
(Requires Coordinated Field Approval)Have
Applicant supply manual hardcopy AND
electronically. (this allows ACO to modify),
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Deviations from STCs

• Deviations from STC must ask the same questions
  as alterations from TC.-Is the deviation from
  the a STC Major or Minor Change in Type
  Design?-STC data must be available to the
  installer and Inspector to make that evaluation?
  (have they purchased the STC?)- Deviations may
  then be approved on Form 337,Installed STC
  SA1234HJ with the following deviations

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Responsibilities of the IA Conducting Annuals.

• Verify the paper work (ie. Flight manuals, ICA
  etc are current for all the modification
  INSTALLED on the aircraft.)

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Example 1

• Propeller installation on a C172.-Constant speed
  installation but is not on the TCDS and not on
  any STC.-2 larger in diameter to propellers on
  TCDS-Equal diameter to propeller for which there
  is an STC for this aircraft (not the same
  prop)-Has been mated to engine on another
  aircraft TCDS (PA-28)-Has adequate installation
  instructions..Major / Minor? Data
  required? Regs?CFA?
  STC? Cert Basis?

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Example 2

• Aeromedical Installation in Mitsubishi MU-2Sled
  Assembly (w/ electrics and oxygen bottles) has
  been installed in Lear 35 and Twin Commander
  under STC. -No STC available for
  MU-2. -Different seat track attachments. -Weight
  and Balance / Loading changes. -Electrical
  systems integration.Major / Minor? Data
  required? Regs?CFA?
  STC? Cert Basis!

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Example 3

• New Brakes on a Cessna 208A
• Aircraft over 6000 lbs.
• Brakes are TSO approved.
• Brakes have been used on a Navajo.
• Existing master cylinders are being used
• Major / Minor? Data required? Regs?
• CFA? STC? Cert Basis!