This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

61480 

Vol. 88, No. 172 

Thursday, September 7, 2023 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1820; Project 

Identifier AD–2023–00510–P] 

RIN 2120–AA64 

Airworthiness Directives; Hamilton 

Sundstrand Corporation Propellers 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

Hamilton Sundstrand Corporation 

(Hamilton Sundstrand) Model 14SF–7, 

14SF–15, and 14SF–23 propellers. This 

proposed AD was prompted by a report 

of an auxiliary motor and pump failing 

to feather a propeller in flight. This 

proposed AD would require 

replacement of a certain auxiliary motor 

and pump. This proposed AD would 

also prohibit installation of a certain 

auxiliary motor and pump on any 

propeller. 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 October 23, 

2023. 

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 

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. 

AD Docket: You may examine the AD 

docket at regulations.gov by searching 

for and locating Docket No. FAA–2023– 

1820; 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. 

Material Incorporated by Reference: 

• For service information identified 

in this NPRM, contact Hamilton 

Sundstrand, One Hamilton Road, 

Windsor Locks, CT 06096–1010, phone: 

(877) 808–7575; email: CRC@

collins.com. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 1200 District Avenue, 

Burlington, MA 01803. For information 

on the availability of this material at the 

FAA, call (817) 222–5110. 

FOR FURTHER INFORMATION CONTACT: 

Isabel Saltzman, Aviation Safety 

Engineer, FAA, 1701 Columbia Avenue, 

College Park, GA 30337; phone: (781) 

238–7649; email: 9-AVS-AIR-BACOCOS@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–2023–1820; Project Identifier AD– 

2023–00510–P’’ 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 this 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 

regulations.gov, including any personal 

information you provide. The agency 

will also post a report summarizing each 

substantive verbal contact received 

about this NPRM. 

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 Isabel Saltzman, 

Aviation Safety Engineer, FAA, 1701 

Columbia Avenue, College Park, GA 

30337. Any commentary that the FAA 

receives which is not specifically 

designated as CBI will be placed in the 

public docket for this rulemaking. 

Background 

The FAA received a report of an 

auxiliary motor and pump installed on 

a non-Hamilton Sundstrand propeller 

failing to feather the propeller in flight 

through either the primary or the 

backup means. The failure was caused 

by motor magnets in the auxiliary motor 

and pump that were de-bonded due to 

corrosion at the magnet and housing 

interface. The de-bonded motor magnets 

prevented motor rotation. Hamilton 

Sundstrand Model 14SF–7, 14SF–15, 

and 14SF–23 propellers use the same 

auxiliary motor and pump. These 

propellers are installed on, but not 

limited to, De Havilland Aircraft of 

Canada Limited (Type Certificate 

previously held by Bombardier Inc.) 

Model DHC–8–100 series, DHC–8–200 

series, and DHC–8–300 series airplanes. 

This condition, if not addressed, could 

result in reduced controllability of the 

aircraft and consequent loss of control 

of the aircraft. 

FAA’s Determination 

The FAA is issuing this NPRM after 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 


ddrumheller on DSK120RN23PROD with PROPOSALS1
Federal Register / Vol. 88, No. 172 / Thursday, September 7, 2023 / Proposed Rules 61481 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Hamilton 

Sundstrand Service Bulletin (SB) 14SF– 

61–168, Revision 1, dated December 21, 

2016. This service information specifies 

instructions for replacing the auxiliary 

motor and pump. Hamilton Sundstrand 

Corporation is a UTC Aerospace 

Systems Company. This service 

information is identified as both 

Hamilton Sundstrand Corporation and 

UTC Aerospace Systems. 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 ADDRESSES. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require the 

removal from service of an auxiliary 

motor and pump having part number (P/ 

N) 782655–3 (Aerocontrolex P/N 4122– 

006009) and replacement with an 

auxiliary motor and pump having P/N 

782655–4 (Aerocontrolex P/N 4122– 

056000). This proposed AD would also 

prohibit installation of an auxiliary 

motor and pump having P/N 782655–3 

(Aerocontrolex P/N 4122–006009) on 

any propeller. 

Differences Between This Proposed AD 

and the Service Information 

Where the service information 

specifies returning certain parts to 

Hamilton Sundstrand, this proposed AD 

does not contain that requirement. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 180 

propellers installed on airplanes of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replace auxiliary motor and pump ................. 2 work-hours × $85 per hour = $170 ............. $11,000 $11,170 $2,010,600 

Perform post-installation system test .............. 1 work-hour × $85 per hour = $85 ................. 0 85 15,300 

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 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 adding 

the following new airworthiness 

directive: 

Hamilton Sundstrand Corporation: Docket 

No. FAA–2023–1820; Project Identifier 

AD–2023–00510–P. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by October 23, 

2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Hamilton Sundstrand 

Corporation (Hamilton Sundstrand) Model 

14SF–7, 14SF–15, and 14SF–23 propellers. 

Note 1 to paragraph (c): These propellers 

are known to be installed on, but not limited 

to, De Havilland Aircraft of Canada Limited 

(Type Certificate previously held by 

Bombardier Inc.) Model DHC–8–100 series, 

DHC–8–200 series, and DHC–8–300 series 

airplanes. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 6123, Propeller Feathering/Reversing. 

(e) Unsafe Condition 

This AD was prompted by a report of an 

auxiliary motor and pump failing to feather 

a propeller in flight. The FAA is issuing this 

AD to prevent the failure of a certain 

auxiliary motor and pump to feather 

propellers. The unsafe condition, if not 

addressed, could result in reduced 

controllability of the aircraft and consequent 

loss of control of the aircraft. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Within 30 months after the effective 

date of this AD, remove from service an 

auxiliary motor and pump having part 

number (P/N) 782655–3 (Aerocontrolex P/N 

4122–006009) and replace with an auxiliary 

motor and pump having P/N 782655–4 

(Aerocontrolex P/N 4122–056000) in 

accordance with the Accomplishment 

Instructions, paragraphs 3.B., 3.C., and 3.E. of 

Hamilton Sundstrand Service Bulletin (SB) 

14SF–61–168, Revision 1, dated December 

21, 2016 (Hamilton Sundstrand SB 14SF–61– 

168, Revision 1). 

(2) After replacement of the auxiliary 

motor and pump, perform a post-installation 

system test in accordance with the 

Accomplishment Instructions, paragraph 3.F. 

of Hamilton Sundstrand SB 14SF–61–168, 

Revision 1. 


ddrumheller on DSK120RN23PROD with PROPOSALS1
61482 Federal Register / Vol. 88, No. 172 / Thursday, September 7, 2023 / Proposed Rules 

(h) Installation Prohibition 

After the effective date of this AD, do not 

install an auxiliary motor and pump having 

P/N 782655–3 (Aerocontrolex P/N 4122– 

006009) on any propeller. 

(i) No Return of Parts 

Where the service information referenced 

in the Accomplishment Instructions, 

paragraph 3.B. of Hamilton Sundstrand SB 

14SF–61–168, Revision 1, specifies returning 

certain parts to the manufacturer for 

modification, this AD does not include that 

requirement. 

(j) Credit for Previous Actions 

You may take credit for the actions 

required by paragraph (g) of this AD if you 

performed those actions before the effective 

date of this AD using Hamilton Sundstrand 

SB 14SF–61–168, Original Issue, dated 

December 14, 2016. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, East Certification 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 

branch office, send it to the attention of the 

person identified in paragraph (l)(1) of this 

AD. Information may be emailed to: 9-AVSAIR-BACO-COS@faa.gov. 

(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 Isabel Saltzman, Aviation Safety 

Engineer, FAA, 1701 Columbia Avenue, 

College Park, GA 30337; phone: (781) 238– 

7649; email: 9-AVS-AIR-BACO-COS@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (m)(3) and (4) of this AD. 

(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) Hamilton Sundstrand Corporation 

Service Bulletin 14SF–61–168, Revision 1, 

dated December 21, 2016. 

Note 2 to paragraph (m)(2)(i): Hamilton 

Sundstrand Corporation is a UTC Aerospace 

Systems Company. This service information 

is identified as both Hamilton Sundstrand 

Corporation and UTC Aerospace Systems. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Hamilton Sundstrand, One 

Hamilton Road, Windsor Locks, CT 06096– 

1010, phone: (877) 808–7575; email: CRC@

collins.com. 

(4) You may view this service information 

at FAA, Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call (817) 222–5110. 

(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, 

email: fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on August 30, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–19085 Filed 9–6–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1819; Project 

Identifier MCAI–2023–00052–A] 

RIN 2120–AA64 

Airworthiness Directives; Piaggio 

Aviation S.p.A. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain Piaggio Aviation S.p.A. (Piaggio) 

Model P–180 airplanes. This proposed 

AD was prompted by a report of 

corrosion on the various aluminum 

alloy reinforcements in the horizontal 

stabilizer (HS) central box caused by a 

humid environment inside the box from 

water ingress and/or condensation. This 

proposed AD would require a one-time 

detailed inspection of the HS central 

box for corrosion; an assessment of the 

corrosion level; and depending on the 

determination, repetitive detailed 

inspections of the HS central box for 

corrosion and the internal composite 

structure for surface cracks, distortion, 

and damage; and repair or replacement 

of the HS assembly. Repair or 

replacement of the HS assembly would 

be terminating action for the repetitive 

inspections. The FAA is proposing this 

AD to address the unsafe condition on 

these products. 

DATES: The FAA must receive comments 

on this NPRM by October 23, 2023. 

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 

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. 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1819; 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, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For service information identified 

in this NPRM, contact Piaggio Aviation 

S.p.A., P180 Customer Support, via 

Pionieri e Aviatori d’Italia, snc—16154 

Genoa, Italy; phone: +39 331 679 74 93; 

email: technicalsupport@

piaggioaerospace.it. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 901 Locust, Kansas City, MO 

64106. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. 

FOR FURTHER INFORMATION CONTACT: 

Sungmo Cho, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: (781) 238– 

7241; email: sungmo.d.cho@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–2023–1819; Project Identifier 

MCAI–2023–00052–A’’ 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 this 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 


ddrumheller on DSK120RN23PROD with PROPOSALS1