Transcript Document

Part 26 DAH Requirements
for
Fuel Tank Flammability
Part4/30/2020
26 Familiarization Briefing for Fuel Tank Flammability Rule
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September 16-18, 2008 (Tukwila, Washington)
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Applicable Part 26 Sections
26.5
26.31
26.33
26.35
Applicability table
Definitions
Holders of type certificates
Changes to type certificates affecting
fuel tank flammability
26.37 Pending type certification projects
26.39 Newly produced airplanes
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§ 26.31 Definitions
• Flammability Exposure Evaluation Time (FEET)
The time from the start of preparing the airplane for flight,
through the flight and landing, until all payload is unloaded
and all passengers and crew have disembarked.
• Fleet Average Flammability Exposure
The percentage of the FEET each fuel tank ullage is
flammable for a fleet of an airplane type operating over the
range of flight lengths in a world-wide range of
environmental conditions and fuel properties as defined in
part 25, Appendix N.
• Normally Emptied Fuel Tank
A fuel tank other than a Main Fuel Tank
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§ 26.33 TC Holders
• Applicability, § 26.33(a)
– U.S. type certificated transport category, turbinepowered airplanes
– Original certificate of airworthiness or export
airworthiness approval issued on or after 1/92.
– Airplanes with:
• A maximum passenger capacity of 30 or more, or
• A maximum payload capacity of 7,500 lbs or more.
– Airplanes designed for all-cargo operations excluded
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§ 26.33(a) Applicable Airplane Models
Aerospatiale
ATR 42, ATR 72
Airbus
A300, A310, A318, A319, A320, A321, A330, A340, A380
BAE
BAe-146, BAe Jetstream 4100, ATP, Avro 146
Boeing
717, 737, 747, 757, 767, 777, MD-80, MD-90, MD-11
Bombardier
CL-600-2B19 (CRJ-100/200/440), CL-600-2C10 (CRJ-700),
CL-600-2D15, CL-600-2D24 (CRJ-900), DHC-8
CASA:
CN-235, C-295
Dornier:
328-100, 328-300
Embraer
EMB-120, EMB-135, EMB-145, ERJ-170, ERJ-190
Fokker:
F.27 Mk 50, F.28 Mk 0070 and Mk 0100
Saab
340 (or SF-340), 2000
NOTE: This list represents our best determination of applicable airplane models at this time. It
is the DAH’s responsibly to identify all of their applicable airplane models.
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Compliance Timeline for TC Holders (§ 26.33)
90
days
Rule
Effective
9/19/08
60
days
60
days
Compliance
Flam.
plan for
analysis
flam.
completed
analysis
2/16/09
12/18/08
Compliance
plan for
design
change and
service
instructions
4/17/09
60
days
15
months
FRM/IMM
Draft of
service
compliance
instructions,
items
ICAs, ALS
7/22/10
9/20/10
ALS - Airworthiness Limitations Sections
FRM - Flammability Reduction Means
IMM – Ignition Mitigation Means
ICAs- Instructions for Continued Airworthiness
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§ 26.33 Flammability Exposure Analysis
(TC Holders)
• Compliance plan
– Must be submitted by 12/18/08 (90 days after rule effective date)
– Must contain:
• Proposed schedule for submitting analysis or determination that analysis
is not required because design change will be developed
• Proposed means of conducting analysis, if applicable.
• Analysis
– Must be submitted by 2/16/09 (150 days after rule effective date)
– Must address all fuel tanks and changes that affect flammability
exposure
– Must be conducted in accordance with part 25, Appendix N
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§ 26.33 Flammability Exposure Analysis
(TC Holders)
– Exception: Analysis is not required for…
• Fuel tanks for which DAH notified FAA they will provide
Flammability Reduction Means (FRM) or Ignition Mitigation
Means (IMM)
• Fuel tanks substantiated to be conventional unheated aluminum
wing tanks
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If analysis shows tank is a high
flammability tank*…
• Design change (FRM or IMM) service instructions,
ICAs, and airworthiness limitations are required
– Compliance plan for design change must be submitted by
4/17/09
– Draft of all compliance items must be submitted by 7/22/10
(60 days before final data and documents are required)
– Design change, service instructions, ICA and airworthiness
limitations must be submitted 9/20/10
* Fleet Average Flammability Exposure exceeds 7%
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Performance Criteria for Flammability
Reduction Means, § 26.33(c)(1)
• Normally emptied fuel tanks with any portion
in fuselage contour
– Must meet flammability exposure criteria of part 25,
Appendix M
• Fleet Average Flam. Exposure may not exceed 3%
• Warm day may not exceed 3%
• Other tanks
– Must meet flammability exposure criteria of part 25
Appendix M, except Fleet Average Flam. Exposure
may not exceed 7%
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Critical Design Configuration Control
Limitations (CDCCL)
• DAHs who are required to make design
changes must develop CDCCLs.
• CDCCLs must be developed to:
– Prevent increasing flammability exposure of tanks with
FRMs.
– Prevent degradation of IMM performance.
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CDCCL Examples
• Limits on heat input such as adding blankets or
additional hydraulic heat exchangers
• Limits on how an auxiliary fuel tank is integrated with
an existing fuel tank system
– Limiting venting into a tank with an FRM based on inerting
– Limiting the transfer of warm fuel from the auxiliary tank
• Limits on use of high volatility fuels such as JP-4
• Limits on systems such as minimum quantity of engine
bleed air flow or electricity that is required to supply
power to an FRM.
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If analysis shows tank is a high
flammability tank*…
• Airworthiness limitations section (ALS) of
maintenance manual or ICA must be submitted by
9/20/10
• ALS must contain CDCCL, inspections, or other
procedures developed under § 26.33(e)
* Fleet Average Flammability Exposure exceeds 7%
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Compliance Plans
• Specific items that must be included in
compliance plan are listed in the rule
• Compliance plans must be submitted to the
FAA Oversight Office
– Foreign manufactures should submit documents to FAA
through their civil aviation authority
• Civil aviation authority may recommend approval
– Approval is retained by FAA – approval is not delegated
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What is the “FAA Oversight Office”?
• The aircraft certification office (ACO) or office of the
Transport Airplane Directorate with oversight
responsibility for the relevant TC or STC
• Defined in § 26.3
• TC examples:
– Boeing (Puget Sound) - Seattle ACO
– Boeing (Long Beach) – Los Angeles ACO
– Airbus - Transport Standards Staff
– Bombardier - New York ACO
– Embraer – Transport Standards Staff
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FAA Review of Compliance Plans
• FAA will complete review of plan within 4 weeks
• If plan is acceptable, FAA will inform DAH via approval
letter within 6 weeks of receipt of proposed plan
• If plan is unacceptable, FAA will
– immediately contact DAH
– identify deficiencies
– notify DAH of deficiencies by letter within
6 weeks of receipt of proposed plan
– work with DAH expeditiously to identify mutually acceptable
corrections
Ref. Order 8110.104
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FAA Review of Revised Compliance Plan
• If revised plan is acceptable, FAA will inform
DAH via approval letter within 3 weeks of
receipt of revised plan
• If no acceptable compliance plan is
submitted, FAA may pursue enforcement
action
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FAA Review of Draft Compliance Data
• FAA will review draft data, and notify DAH
within 5 weeks of receipt of data if the data is
acceptable or not acceptable
• If data is not acceptable, the FAA will work
with DAH to identify mutually acceptable
solutions to correct deficiencies
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FAA Review of Final Compliance Data
• FAA will review final data, and if acceptable, notify DAH
within 6 weeks of receipt of data
•
If not acceptable, FAA will –
– Identify and notify DAH of deficiencies within
5 weeks of receipt of final data
– Work with DAH to identify mutually acceptable solutions to
correct deficiencies
• FAA will review revised data, and approve, if
acceptable within 3 weeks of receipt
• If no data is submitted or if there is no acceptable
resolution of issues to support compliance, FAA may
initiate enforcement actions
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Foreign DAH Communications
• All compliance plans and compliance
data are submitted through the foreign
civil aviation authority oversight office
to the FAA
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§ 26.35 Changes to type certificates
• Applicability, § 26.35(a)
– Section 26.35 applies to the following design changes on airplanes
subject to § 26.33(a): See slide 5 for applicable airplane models.
Certificate
Applicable Design Change
Reference
Existing STC or
field approval*
Any fuel tank designed to be Normally Emptied
§ 26.35(a)(1)
Pending
STC/ATC*
Any fuel tank designed to be Normally Emptied
§ 26.35(a)(2)
Future
STC/ATC**
• Installation of Normally Emptied fuel tank, or
• Changes to existing tank capacity, or
• Changes that may increase flammability
exposure of tank for which FRM or IMM is
required.
§ 26.35(a)(3)
* As of 9/19/08 **Applications made on or after 9/19/08
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Compliance Timeline for TC Holders (§ 26.33)
90
days
60
days
60
days
15
months
Rule
Compliance Flam. Compliance
effective
plan for
plan for
analysis
9/19/08
design
flam.
completed
analysis
2/16/09 change and
service
12/18/08
instructions
4/17/09
60
days
ALS - Airworthiness Limitations Sections
FRM - Flammability Reduction Means
IMM – Ignition Mitigation Means
FIMM – Flammability Impact Mitigation Means
Draft of FRM/IMM
compliance service
items instructions,
7/22/10 ICAs, ALS
9/20/10
Compliance Timeline for Holders and Applicants of Changes to Certificates (§ 26.35)
90
days
Compliance
Rule
plan for
effective
flam.
9/19/08
analysis
12/18/08
14
months
9
months
Flam.
analysis
completed
9/20/09
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2
months months
60
days
14
months
Impact FIMM
Impact
assessment assessment plan
3/21/11 5/19/11
plan
11/19/10
Federal Aviation
Administration
FIMM Final
draft FIMM
items
items
7/21/12 9/19/12
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§ 26.35 Flammability Exposure Analysis
• All DAHs and applicants identified on earlier slide, which
lists § 26.35 applicability, must conduct analysis
– Exceptions
• Fuel tanks for which DAH/applicant notified FAA it will provide design change
and service instructions for an IMM
• Fuel tanks substantiated to be conventional unheated aluminum wing tanks.
• Compliance plan
– Existing STC and field approval holders must submit by 12/18/08
– Current and future applicants provide as part of their certification project
• Analysis must be conducted in accordance with part 25,
Appendix N
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§ 26.35 Impact Assessment
• Must be conducted by:
– Existing holders of STCs and field approvals for Normally
Emptied fuel tank installations on:
• Boeing 737, 747, 757, 767, 777
• Airbus A300, A310, A318, A319, A320, A321, A330, A340
– Future STC/ATC applicants for changes that may
increase the flammability exposure of a tank for which
FRM or IMM is required
• Must identify any features that compromise
previously defined CDCCLs
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§ 26.35 Impact Assessment
• Compliance dates for holders of STCs and field
approvals
– Impact assessment plan: 11/19/10
– Impact assessment: 3/21/11
• Compliance dates for future STC/ATC applicants
– Impact assessment plan: Part 26 does not specify compliance date.
– Impact assessment: 3/21/11 or before certificate is issued
• Documents must be submitted to FAA Oversight Office
for approval
– May not be delegated
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§ 26.35 Design Changes and Service Instructions
Applicable Certificate
Design Changes and Service Instructions
Existing STC or field approval - § 26.35(a)(1)
• Fuel tank designed to be Normally Emptied
If assessment identifies features that
compromise CDCCL, design change and
service instructions for Flammability Impact
Mitigation Means (FIMM) required
Pending STC/ATC - § 26.35(a)(2)
• Fuel tank designed to be Normally Emptied
Change must comply with § 25.981, effective
9/19/08.
Future STC/ATC - § 26.35(a)(3) Applies if:
1. Installation of Normally Emptied fuel tank
2. Changes to existing tank capacity
3. Changes that may increase flammability
exposure of tank for which FRM or IMM is
required.
1. Change must comply with § 25.981,
effective 9/19/08
2. Change must comply with § 26.33
3. If assessment identifies features that
compromise CDCCL, design change and
service instructions for FIMM required
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§ 26.37 Pending TC projects
• Pending TC projects* must include § 25.981, effective
9/19/08 in certification basis.
• Applicable airplanes would have
– a maximum passenger capacity of 30 or more, or
– a maximum payload capacity of 7,500 lbs. or more.
• Example airplanes
–
–
–
–
Airbus A350
Alenia C-27J
Boeing 787
Commercial Aircraft Corporation of China ARJ21
* Application made before 9/19/08, but TC not issued by that date.
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§ 26.39 Newly produced airplanes
• Applicable airplanes
– Boeing model 737, 747, 767 and 777
– Passenger and cargo versions of models
– Application for original certificate of airworthiness or
export airworthiness approvals made after 9/20/10.
Note: Although Airbus is not required to comply with this section,
the operating rules require any newly produced Boeing or Airbus
airplanes put into service after Sept. 19, 2010 to meet the same
flammability requirements.
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§ 26.39 Newly produced airplanes
• Fuel tanks meeting all of the following criteria
must have an FRM or IMM meeting § 25.981,
effective 9/19/08
– Fuel tank is Normally Emptied
– Any portion of tank is within fuselage contour
– Tank exceeds Fleet Average Flam. Exposure of 7%
• All other tanks that exceed Fleet Average
Flammability Exposure of 7% must have:
– IMM that meets § 25.981(d), or
– FRM that meet Appendix M, except the Fleet Average
Flammability Exposure may not exceed 7%
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