35128 Federal Register / Vol. 87, No. 111 / Thursday, June 9, 2022 / Proposed Rules 

(h) Repetitive Testing, Inspection, and 

Replacement for Certain Airplanes 

For Model CL–600–2B16 airplanes having 

S/Ns 5701 through 5988 inclusive, 6050 

through 6158 inclusive, and 6160 through 

6162 inclusive, do the actions specified in 

paragraphs (h)(1) and (2) of this AD. 

(1) Within 1,000 flight hours after the 

effective date of this AD, test each rudder 

PCU load limiter for correct functioning, in 

accordance with paragraph 2.B., Part A, of 

the Accomplishment Instructions of the 

applicable service information specified in 

figure 1 to paragraph (g) of this AD. Repeat 

the test thereafter at intervals not to exceed 

800 flight hours until the inspection required 

by paragraph (h)(2) of this AD has been 

accomplished. If any rudder PCU load limiter 

fails any test, before further flight, do the 

inspection specified in paragraph (h)(2) of 

this AD. 

(2) Within 3,400 flight hours after the 

effective date of this AD, inspect each rudder 

PCU load limiter having P/N 600–91302–43 

or P/N 600–91302–53 for correct crimping of 

the end cap, in accordance with paragraph 

2.C., Part B, of the Accomplishment 

Instructions of the applicable service 

information specified in figure 1 to paragraph 

(g) of this AD. If the crimping is missing from 

any end cap, before further flight, replace the 

defective rudder PCU load limiter, in 

accordance with paragraph 2.D., Part C, of 

the Accomplishment Instructions of the 

applicable service information specified in 

figure 1 to paragraph (g) of this AD. 

Accomplishment of this inspection 

terminates the repetitive testing required by 

paragraph (h)(1) of this AD. 

(i) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to ATTN: Program Manager, 

Continuing Operational Safety, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300. Before using any approved 

AMOC, notify your appropriate principal 

inspector, or lacking a principal inspector, 

the manager of the responsible Flight 

Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, New York ACO Branch, 

FAA; or Transport Canada Civil Aviation 

(TCCA); or Bombardier, Inc.’s TCCA Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(j) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) TCCA AD 

CF–2021–33, dated October 6, 2021, for 

related information. This MCAI may be 

found in the AD docket on the internet at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2022–0603. 

(2) For more information about this AD, 

contact Elizabeth Dowling, Aerospace 

Engineer, Mechanical Systems and 

Administrative Services Section, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300; email 9-avs-nyaco-cos@

faa.gov. 

(3) For service information identified in 

this AD, contact Bombardier Business 

Aircraft Customer Response Center, 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–2999; email 

ac.yul@aero.bombardier.com; internet 

https://www.bombardier.com. You may view 

this service information at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

Issued on May 31, 2022. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–12256 Filed 6–8–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0672; Project 

Identifier MCAI–2020–01606–T] 

RIN 2120–AA64 

Airworthiness Directives; De Havilland 

Aircraft of Canada Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2020–04–20, which applies to certain 

De Havilland Aircraft of Canada Limited 

Model DHC–8–400 series airplanes. AD 

2020–04–20 requires repetitive 

inspections of certain parts for 

discrepancies that meet specified 

criteria, and replacement as necessary; 

repetitive inspections of certain parts for 

damage and wear, and rework of parts; 

and electrical bonding checks of certain 

couplings. AD 2020–04–20 also requires 

revising the existing maintenance or 

inspection program, as applicable, to 

incorporate new or more restrictive 

airworthiness limitations. For certain 

airplanes, AD 2020–04–20 allows a 

modification that would terminate the 

repetitive inspections. Since the FAA 

issued AD 2020–04–20, the FAA has 

determined that a more robust lightning 

ignition protection design is necessary 

and that additional airplanes are 

affected by the unsafe condition. This 

proposed AD would continue to require 

the actions in AD 2020–04–20, revise 

the applicability by adding airplanes, 

and require, for certain airplanes, the 

previously optional rework and retrofit 

of certain parts of the fuel system. Doing 

the rework and retrofit would terminate 

the retained initial and repetitive 

inspections in this AD. The FAA is 

proposing this AD to address the unsafe 

condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by July 25, 2022. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

https://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this NPRM, contact De Havilland 

Aircraft of Canada Limited, Q-Series 

Technical Help Desk, 123 Garratt 

Boulevard, Toronto, Ontario M3K 1Y5, 

Canada; telephone 416–375–4000; fax 

416–375–4539; email thd@

dehavilland.com; internet https://

dehavilland.com. You may view this 

service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2022– 

0672; or in person at Docket Operations 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

The AD docket contains this NPRM, any 

comments received, and other 

information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Joseph Catanzaro, Aerospace Engineer, 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 87, No. 111 / Thursday, June 9, 2022 / Proposed Rules 35129 

Airframe and Propulsion Section, FAA, 

New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590; telephone 516–228–7366; email 

9-avs-nyaco-cos@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this proposal. Send 

your comments to an address listed 

under ADDRESSES. Include ‘‘Docket No. 

FAA–2022–0672; Project Identifier 

MCAI–2020–01606–T’’ at the beginning 

of your comments. The most helpful 

comments reference a specific portion of 

the proposal, explain the reason for any 

recommended change, and include 

supporting data. The FAA will consider 

all comments received by the closing 

date and may amend the proposal 

because of those comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to https://

www.regulations.gov, including any 

personal information you provide. The 

agency will also post a report 

summarizing each substantive verbal 

contact received about this proposed 

AD. 

Confidential Business Information 

CBI is commercial or financial 

information that is both customarily and 

actually treated as private by its owner. 

Under the Freedom of Information Act 

(FOIA) (5 U.S.C. 552), CBI is exempt 

from public disclosure. If your 

comments responsive to this NPRM 

contain commercial or financial 

information that is customarily treated 

as private, that you actually treat as 

private, and that is relevant or 

responsive to this NPRM, it is important 

that you clearly designate the submitted 

comments as CBI. Please mark each 

page of your submission containing CBI 

as ‘‘PROPIN.’’ The FAA will treat such 

marked submissions as confidential 

under the FOIA, and they will not be 

placed in the public docket of this 

NPRM. Submissions containing CBI 

should be sent to Joseph Catanzaro, 

Aerospace Engineer, Airframe and 

Propulsion Section, FAA, New York 

ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avsnyaco-cos@faa.gov. Any commentary 

that the FAA receives which is not 

specifically designated as CBI will be 

placed in the public docket for this 

rulemaking. 

Discussion 

The FAA issued AD 2020–04–20, 

Amendment 39–19857 (61 FR 17473, 

March 30, 2020) (AD 2020–04–20), for 

certain De Havilland Aircraft of Canada 

Limited Model DHC–8–400 series 

airplanes. AD 2020–04–20 requires 

repetitive inspections of certain parts for 

discrepancies that meet specified 

criteria, and replacement as necessary; 

repetitive inspections of certain parts for 

damage and wear, and rework of parts; 

and electrical bonding checks of certain 

couplings. AD 2020–04–20 also requires 

revising the existing maintenance or 

inspection program, as applicable, to 

incorporate new or more restrictive 

airworthiness limitations. For certain 

airplanes, AD 2020–04–20 allows a 

modification that would terminate the 

repetitive inspections. AD 2020–04–20 

resulted from reports of wear on fuel 

couplings, bonding springs, and sleeves 

as well as fuel tube end ferrules and fuel 

component end ferrules. The FAA 

issued AD 2020–04–20 to address wear 

on fuel couplings, bonding springs, and 

sleeves as well as fuel tube end ferrules 

and fuel component end ferrules, which 

could reduce the integrity of the 

electrical bonding paths through the 

fuel line and components, and 

ultimately lead to fuel tank ignition in 

the event of a lightning strike. 

Actions Since AD 2020–04–20 Was 

Issued 

Since the FAA issued AD 2020–04– 

20, the FAA has determined that a more 

robust lightning ignition protection 

design is necessary, which will better 

mitigate the risk of lightning strike 

induced fuel tank ignition through the 

use of high resistance isolators, a new 

fuel coupling design, and improved 

structural support. Additional airplanes 

are also affected by the unsafe 

condition. 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued TCCA AD CF– 

2017–04R3, dated April 1, 2020 (also 

referred to as the Mandatory Continuing 

Airworthiness Information, or ‘‘the 

MCAI’’), to correct an unsafe condition 

for certain De Havilland Aircraft of 

Canada Limited Model DHC–8–400 

series airplanes. You may examine the 

MCAI in the AD docket on the internet 

at https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0672. 

This proposed AD was prompted by 

reports of wear on fuel couplings, 

bonding springs, and sleeves as well as 

fuel tube end ferrules and fuel 

component end ferrules, and that a more 

robust lightning ignition protection 

design is necessary. The FAA is 

proposing this AD to address wear on 

fuel couplings, bonding springs, and 

sleeves as well as fuel tube end ferrules 

and fuel component end ferrules, which 

could reduce the integrity of the 

electrical bonding paths through the 

fuel line and components, and 

ultimately lead to fuel tank ignition in 

the event of a lightning strike. See the 

MCAI for additional background 

information. 

Related Service Information Under 1 

CFR Part 51 

This proposed AD would require the 

following service information, which 

the Director of the Federal Register 

approved for incorporation by reference 

as of May 4, 2020 (61 FR 17473, March 

30, 2020). 

• Bombardier Service Bulletin 84–28– 

20, Revision D, dated November 23, 

2018. 

• Bombardier Service Bulletin 84–28– 

21, Revision C, dated July 13, 2018. 

• Bombardier Service Bulletin 84–28– 

26, Revision A, dated November 29, 

2018. 

• Q400 Dash 8 (Bombardier) 

Temporary Revision ALI–0192, dated 

April 24, 2018. 

• Q400 Dash 8 (Bombardier) 

Temporary Revision ALI–0193, dated 

April 24, 2018. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section. 

FAA’s Determination 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with the State 

of Design Authority, the FAA has been 

notified of the unsafe condition 

described in the MCAI and service 

information referenced above. The FAA 

is proposing this AD because the FAA 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 

Proposed Requirements of This NPRM 

This proposed AD would retain all of 

the requirements of AD 2020–04–20. 

This proposed AD would also require 

revising the applicability by adding 

airplanes, and for certain airplanes, 

reworking and retrofitting certain parts 

of the fuel system. Doing the rework and 

retrofit would terminate the existing 

initial and repetitive inspections in this 

proposed AD. 


lotter on DSK11XQN23PROD with PROPOSALS1
35130 Federal Register / Vol. 87, No. 111 / Thursday, June 9, 2022 / Proposed Rules 

Costs of Compliance 

The FAA estimates that this proposed 

AD affects 54 airplanes of U.S. registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS * 

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Retained actions from AD 

2020–04–20.

268 work-hours × $85 per hour = $22,780 ....... $0 $22,780 ............... $1,230,120. 

New proposed actions .............. Up to 1,747 work-hours × $85 per hour = Up to 

$148,495.

87,385 Up to $235,880 ... Up to $12,737,520. 

* Table does not include estimated costs for revising the existing maintenance or inspection program. 

The FAA has determined that revising 

the existing maintenance or inspection 

program takes an average of 90 workhours per operator, although the FAA 

recognizes that this number may vary 

from operator to operator. In the past, 

the FAA has estimated that this action 

takes 1 work-hour per airplane. Since 

operators incorporate maintenance or 

inspection program changes for their 

affected fleet(s), the FAA has 

determined that a per-operator estimate 

is more accurate than a per-airplane 

estimate. Therefore, the FAA estimates 

the total cost per operator to be $7,650 

(90 work-hours × $85 per work-hour). 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

The FAA has determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would not 

have a substantial direct effect on the 

States, on the relationship between the 

national Government and the States, or 

on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Would not affect intrastate 

aviation in Alaska, and 

(3) Would not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by: 

■ a. Removing Airworthiness Directive 

(AD) 2020–04–20, Amendment 39– 

19857 (61 FR 17473, March 30, 2020); 

and 

■ b. Adding the following new AD: 

De Havilland Aircraft of Canada Limited 

(Type Certificate previously held by 

Bombardier, Inc.): Docket No. FAA– 

2022–0672; Project Identifier MCAI– 

2020–01606–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by July 25, 2022. 

(b) Affected ADs 

This AD replaces AD 2020–04–20, 

Amendment 39–19857 (61 FR 17473, March 

30, 2020) (AD 2020–04–20). 

(c) Applicability 

This AD applies to De Havilland Aircraft 

of Canada Limited Model DHC–8–400, –401, 

and –402 airplanes, certificated in any 

category, manufacturer serial numbers 4001 

and 4003 and subsequent. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 28, Fuel. 

(e) Reason 

This AD was prompted by reports of wear 

on fuel couplings, bonding springs, and 

sleeves as well as fuel tube end ferrules and 

fuel component end ferrules, and that a more 

robust lightning ignition protection design is 

necessary. The FAA is issuing this AD to 

address such wear, which could reduce the 

integrity of the electrical bonding paths 

through the fuel line and components, and 

ultimately lead to fuel tank ignition in the 

event of a lightning strike. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Initial Inspection Compliance 

Times, With New Terminating Action 

This paragraph restates the requirements of 

paragraph (g) of AD 2020–04–20, with new 

terminating action. For airplanes having 

serial numbers 4001 and 4003 through 4575 

inclusive that, as of May 4, 2020 (the 

effective date of AD 2020–04–20), have not 

done the actions specified in Bombardier 

Service Bulletin 84–28–21: At the applicable 

times specified in paragraph (g)(1) or (2) of 

this AD, do the actions specified in 

paragraphs (h)(1) and (2) of this AD. 

Accomplishing the terminating action 

required by paragraph (o) of this AD 

terminates the initial inspection required by 

this paragraph. 

(1) For all airplanes except those identified 

in paragraph (g)(2) of this AD: Within 6,000 

flight hours or 36 months, whichever occurs 

first after May 4, 2020 (the effective date of 

AD 2020–04–20). 

(2) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or after 

May 4, 2020 (the effective date of AD 2020– 

04–20): Within 6,000 flight hours or 36 

months, whichever occurs first after the date 

of issuance of the original airworthiness 

certificate or the date of issuance of the 

original export certificate of airworthiness. 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 87, No. 111 / Thursday, June 9, 2022 / Proposed Rules 35131 

(h) Retained Repetitive Inspections and 

Corrective Actions, With New Terminating 

Action 

This paragraph restates the requirements of 

paragraph (h) of AD 2020–04–20, with new 

terminating action. For airplanes having 

serial numbers 4001 and 4003 through 4575 

inclusive that, as of May 4, 2020 (the 

effective date of AD 2020–04–20), have not 

done the actions specified in Bombardier 

Service Bulletin 84–28–21: At the applicable 

times specified in paragraph (g)(1) or (2) of 

this AD, do the actions specified in 

paragraphs (h)(1) and (2) of this AD. Repeat 

the actions thereafter at intervals not to 

exceed 6,000 flight hours or 36 months, 

whichever occurs first. Accomplishing the 

terminating action required by paragraph (o) 

of this AD terminates the repetitive 

inspections required by this paragraph. 

(1) Do a detailed inspection of the 

clamshell coupling bonding wires, fuel 

couplings, and associated sleeves for 

discrepancies that meet specified criteria, as 

identified in, and in accordance with, 

paragraph 3.B., ‘‘Procedure,’’ of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–28–20, Revision D, dated 

November 23, 2018. If any conditions are 

found meeting the criteria specified in 

Bombardier Service Bulletin 84–28–20, 

Revision D, dated November 23, 2018, before 

further flight, replace affected parts with new 

couplings and sleeves of the same part 

number, in accordance with paragraph 3.B., 

‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Bulletin 84–28– 

20, Revision D, dated November 23, 2018. 

(2) Do a detailed inspection of the fuel tube 

end ferrules, fuel component end ferrules, 

and ferrule O-ring flanges for damage and 

wear, and rework (repair, replace, or blend, 

as applicable) the parts, in accordance with 

paragraph 3.B., ‘‘Procedure,’’ of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–28–20, Revision D, dated 

November 23, 2018. 

(i) Retained Electrical Bonding Checks/ 

Detailed Inspection, With No Changes 

This paragraph restates the requirements of 

paragraph (j) of AD 2020–04–20, with no 

changes. For airplanes having serial numbers 

4001, 4003 through 4489 inclusive, and 4491 

through 4575 inclusive that, as of May 4, 

2020 (the effective date of AD 2020–04–20), 

have done the actions specified in 

Bombardier Service Bulletin 84–28–21, 

Revision A, dated September 29, 2017; and 

airplanes having serial numbers 4576 

through 4581 inclusive: Within 6,000 flight 

hours or 36 months after May 4, 2020, 

whichever occurs first, do the actions 

specified in paragraph (i)(1) or (2) of this AD. 

(1) Accomplish electrical bonding checks 

of all threaded couplings on the inboard vent 

lines in the left and right wings, in 

accordance with paragraph 3.B., 

‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–26, Revision A, dated November 29, 

2018. 

(2) Do a detailed inspection of the fuel tube 

end ferrules, fuel component end ferrules, 

and ferrule O-ring flanges for damage and 

wear, and rework (repair, replace, or blend, 

as applicable) the parts; and a retrofit 

(structural rework) of the fuel couplings, 

isolators, and structural provisions; in 

accordance with paragraph 3.B., 

‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–21, Revision C, dated July 13, 2018. 

(j) Retained Revision of the Existing 

Maintenance or Inspection Program, With 

No Changes 

This paragraph restates the requirements of 

paragraph (k) of AD 2020–04–20, with no 

changes. Within 30 days after May 4, 2020 

(the effective date of AD 2020–04–20), revise 

the existing maintenance or inspection 

program, as applicable, to incorporate the 

information specified in Q400 Dash 8 

(Bombardier) Temporary Revision ALI–0192, 

dated April 24, 2018; and Q400 Dash 8 

(Bombardier) Temporary Revision ALI–0193, 

dated April 24, 2018. Except as specified in 

paragraph (k) of this AD, the initial 

compliance time for doing the tasks in Q400 

Dash 8 (Bombardier) Temporary Revision 

ALI–0192, dated April 24, 2018, is at the time 

specified in Q400 Dash 8 (Bombardier) 

Temporary Revision ALI–0192, dated April 

24, 2018, or within 30 days after May 4, 2020, 

whichever occurs later. 

(k) Retained Initial Compliance Time for 

Task 284000–419, With No Changes 

This paragraph restates the requirements of 

paragraph (l) of AD 2020–04–20, with no 

changes. The initial compliance time for task 

284000–419 is at the time specified in 

paragraph (k)(1) or (2) of this AD, as 

applicable, or within 30 days after May 4, 

2020 (the effective date of AD 2020–04–20), 

whichever occurs later. 

(1) For airplanes having serial numbers 

4001 and 4003 through 4575 inclusive: 

Within 18,000 flight hours or 108 months, 

whichever occurs first, after the earliest date 

of embodiment of Bombardier Service 

Bulletin 84–28–21 on the airplane. 

(2) For airplanes having serial numbers 

4576 and subsequent: Within 18,000 flight 

hours or 108 months, whichever occurs first, 

from the date of issuance of the original 

airworthiness certificate or original export 

certificate of airworthiness. 

(l) Retained No Alternative Actions, 

Intervals, or Critical Design Configuration 

Control Limitations (CDCCLs), With No 

Changes 

This paragraph restates the requirements of 

paragraph (m) of AD 2020–04–20, with no 

changes. After the existing maintenance or 

inspection program has been revised as 

required by paragraph (j) of this AD, no 

alternative actions (e.g., inspections), 

intervals, or CDCCLs may be used unless the 

actions, intervals, and CDCCLs are approved 

as an alternative method of compliance 

(AMOC) in accordance with the procedures 

specified in paragraph (p)(1) of this AD. 

(m) Retained No Reporting Provisions, With 

No Changes 

This paragraph restates the provisions of 

paragraph (n) of AD 2020–04–20, with no 

changes. Although Bombardier Service 

Bulletin 84–28–20, Revision D, dated 

November 23, 2018, specifies to submit 

certain information to the manufacturer, this 

AD does not include that requirement. 

(n) Retained Credit for Previous Actions, 

With No Changes 

(1) This paragraph restates the 

requirements of paragraph (o) of AD 2020– 

04–20, with no changes. This paragraph 

provides credit for the actions required by 

paragraphs (h)(1) and (2) of this AD, if those 

actions were performed before May 4, 2020 

(the effective date of AD 2020–04–20), using 

the service information specified in 

paragraph (n)(1)(i) through (iii) of this AD. 

(i) Bombardier Service Bulletin 84–28–20, 

Revision A, dated December 14, 2016. 

(ii) Bombardier Service Bulletin 84–28–20, 

Revision B, dated February 13, 2017. 

(iii) Bombardier Service Bulletin 84–28–20, 

Revision C, dated April 28, 2017. 

(2) For the airplane having serial number 

4164, this paragraph provides credit for the 

initial inspections required by paragraphs 

(h)(1) and (2) of this AD, if those actions were 

performed before May 4, 2020 (the effective 

date of AD 2020–04–20), using Bombardier 

Service Bulletin 84–28–20, dated September 

30, 2016. 

(3) This paragraph provides credit for the 

actions specified in paragraph (o) of this AD 

if those actions were performed before May 

4, 2020 (the effective date of AD 2020–04– 

20), using the service information specified 

in paragraph (n)(3)(i) through (v) of this AD. 

(i) Bombardier Service Bulletin 84–28–21, 

dated August 31, 2017. 

(ii) Bombardier Service Bulletin 84–28–21, 

Revision A, dated September 29, 2017, in 

combination with incorporating the 

information specified in Bombardier 

Modification Summary Package (ModSum) 

IS4Q2800032, Revision A, dated February 1, 

2018. 

(iii) Bombardier Service Bulletin 84–28–21, 

Revision A, dated September 29, 2017, in 

combination with incorporating any of the 

applicable airworthiness limitation change 

request (ACR) specified in figure 1 to 

paragraph (n)(6)(ii) of this AD. 

(iv) Bombardier Service Bulletin 84–28–21, 

Revision B, dated June 8, 2018. 

(4) This paragraph provides credit for the 

actions required by paragraph (i)(1) of this 

AD if those actions were performed before 

May 4, 2020 (the effective date of AD 2020– 

04–20), using Bombardier Service Bulletin 

84–28–26, dated August 14, 2018. 

(5) This paragraph provides credit for the 

actions required by paragraph (i)(2) of this 

AD if those actions were performed before 

May 4, 2020 (the effective date of AD 2020– 

04–20), using Bombardier Service Bulletin 

84–28–21, Revision B, dated June 8, 2018. 

(6) For airplanes having serial numbers 

4001, 4003 through 4489 inclusive, and 4491 

through 4575 inclusive, and that are post 

Bombardier Service Bulletin 84–28–21, 

Revision A, dated September 29, 2017: This 

paragraph provides credit for the actions 

required by paragraph (i) of this AD if those 

actions were performed before May 4, 2020 

(the effective date of AD 2020–04–20), using 

the service information specified in 

paragraph (n)(6)(i) or (ii) of this AD. 

(i) Bombardier Modification Summary 

Package (ModSum) IS4Q2800032, dated 

February 1, 2018. 


lotter on DSK11XQN23PROD with PROPOSALS1
35132 Federal Register / Vol. 87, No. 111 / Thursday, June 9, 2022 / Proposed Rules 

(ii) Any ACR specified in figure 1 to 

paragraph (n)(6)(ii) of this AD. 

(o) Rework and Retrofit 

For airplanes having serial numbers 4001, 

4003 through 4489 inclusive, and 4491 

through 4575 inclusive, that have 

accomplished the actions specified in 

Bombardier Service Bulletin 84–28–21, 

Revision A, dated September 29, 2017, but 

have not incorporated the information in 

Bombardier Modification Summary Package 

(ModSum) IS4Q2800032, Revision A, dated 

February 1, 2018, or have not incorporated 

any of the applicable ACR specified in figure 

1 to paragraph (n)(6)(ii) of this AD: At the 

applicable time specified in paragraph (o)(1) 

or (2) of this AD, rework (repair, replace, or 

blend, as applicable) the parts (fuel tube end 

ferrules, fuel component end ferrules, and 

ferrule O-ring flanges); and do a retrofit 

(structural rework) of the fuel couplings, 

isolators, and structural provisions; in 

accordance with Part B of paragraph 3.B., 

‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–21, Revision C, dated July 13, 2018. 

Accomplishing these actions terminates the 

initial and repetitive inspections required by 

paragraphs (g) and (h) of this AD. 

(1) For airplanes with greater than 20,000 

total flight hours as of the effective date of 

this AD: Do the actions within 6,000 flight 

hours or 36 months after the effective date of 

this AD, whichever occurs first. 

(2) For airplanes with less than or equal to 

20,000 total flight hours as of the effective 

date of this AD: Do the actions within 8,000 

flight hours or 48 months after the effective 

date of this AD, whichever occurs first. 

(p) Other FAA AD Provisions 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to ATTN: Program Manager, 

Continuing Operational Safety, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300. Before using any approved 

AMOC, notify your appropriate principal 

inspector, or lacking a principal inspector, 

the manager of the responsible Flight 

Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, New York ACO Branch, 

FAA; or Transport Canada Civil Aviation 

(TCCA); De Havilland Aircraft of Canada 

Limited’s TCCA Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(q) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) TCCA AD 

CF–2017–04R3, issued April 1, 2020 for 

related information. This MCAI may be 

found in the AD docket on the internet at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2022–0672. 

(2) For more information about this AD, 

contact Joseph Catanzaro, Aerospace 

Engineer, Airframe and Propulsion Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7366; email 9-avs-nyacocos@faa.gov. 

(3) For service information identified in 

this AD, contact De Havilland Aircraft of 

Canada Limited, Q-Series Technical Help 

Desk, 123 Garratt Boulevard, Toronto, 

Ontario M3K 1Y5, Canada; telephone 416– 

375–4000; fax 416–375–4539; email thd@

dehavilland.com; internet https://

dehavilland.com. You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety Branch, 

2200 South 216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

Issued on June 2, 2022. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–12265 Filed 6–8–22; 8:45 am] 

BILLING CODE 4910–13–P 


lotter on DSK11XQN23PROD with PROPOSALS1EP09JN22.009</GPH>

Figure 1 to paragraph (n)(6)(ii)-ACRs 

ACRNumber Dated 

400-072 January 24, 2018 

400-073 January 23, 2018 

400-074 January 24, 2018 

400-077 February 27, 2018 

400-078 March 21, 2018 

400-079 April 18, 2018 

400-080 April 30, 2018 

400-081 May 4, 2018 

400-082 May 4, 2018 

400-083 June 4, 2018 

400-084 May 18, 2018