This section of the FEDERAL REGISTER
contains regulatory documents having generalapplicability and legal effect, most of whichare keyed to and codified in the Code ofFederal Regulations, which is published under50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by
the Superintendent of Documents.Rules and RegulationsFederal Register3921 
Vol. 87, No. 17 
Wednesday, January 26, 2022 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 25 
[Docket No. FAA–2022–0056; Special 
Conditions No. 25–806–SC] 
Special Conditions: Peregrine; Installed Rechargeable Lithium 
Batteries 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final special conditions; request 
for comments. 
SUMMARY : These special conditions are 
issued for a supplemental type certificate to install rechargeable lithium batteries in the Emergency Exit Light (EEL) power supply on certain transport category airplanes. These airplanes, as modified by Peregrine, will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. This design feature is the installation of an EEL power supply that contains rechargeable lithium batteries. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. 
DATES : This action is effective on 
Peregrine on January 26, 2022. Send comments on or before March 14, 2022. 
ADDRESSES : Send comments identified 
by Docket No. FAA–2022–0056 using any of the following methods: 
•Federal eRegulations Portal: Go to 
http://www.regulations.gov/ and follow 
the online instructions for sending your comments electronically. 
•Mail: Send comments to Docket 
Operations, M–30, U.S. Department of Transportation (DOT), 1200 New Jersey Avenue SE, Room W12–140, West Building Ground Floor, Washington, DC 20590–0001. 
•Hand Delivery or Courier: Take 
comments to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. 
•Fax: Fax comments to Docket 
Operations at 202–493–2251. 
Privacy: 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 http://www.regulations.gov/, including any 
personal information you provide. The FAA will also post a report summarizing each substantive verbal contact received about this proposal. 
Confidential Business Information: 
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 Notice 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 Notice, 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 the indicated comments will not be placed in the public docket of this Notice. Submissions containing CBI should be sent to Nazih Khaouly, Aircraft Systems, AIR–623, Technical Innovation Policy Branch, Policy and Innovation Division, Aircraft Certification Service, Federal Aviation Administration, 2200 South 216th Street, Des Moines, Washington 98198; telephone and fax 206–231– 3160; email nazih.khaouly@faa.gov. Comments the FAA receives, which are not specifically designated as CBI, will be placed in the public docket for this rulemaking. 
Docket: Background documents or 
comments received may be read at http://www.regulations.gov/ at any time. 
Follow the online instructions for accessing the docket or go to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. 
FOR FURTHER INFORMATION CONTACT : 
Nazih Khaouly, Aircraft Systems, AIR– 623, Technical Innovation Policy Branch, Policy and Innovation Division, Aircraft Certification Service, Federal Aviation Administration, 2200 South 216th Street, Des Moines, Washington 98198; telephone and fax 206 231 3160; email nazih.khaouly@faa.gov. 
SUPPLEMENTARY INFORMATION : The 
substance of these special conditions has been published in the Federal Register for public comment in several 
prior instances with no substantive comments received. Therefore, the FAA has determined that prior public notice and comment are unnecessary, and finds that, for the same reason, good cause exists for adopting these special conditions upon publication in the Federal Register. 
Comments Invited 
The FAA invites interested people to 
take part in this rulemaking by sending 
written comments, data, or views. The most helpful comments reference a specific portion of the special conditions, explain the reason for any recommended change, and include supporting data. 
The FAA will consider all comments 
received by the closing date for comments. The FAA may change these special conditions based on the comments received. 
Background 
On January 22, 2021, Peregrine 
applied for a supplemental type 
certificate to install rechargeable lithium batteries in the ELL power supply. Peregrine wants to apply this STC to multiple transport category airplanes and may periodically amend this STC to expand its applicability to include additional transport category airplane makes and models. 
Type Certification Basis 
Under the provisions of title 14, Code 
of Federal Regulations (14 CFR) 21.101, 
Peregrine must show that airplanes, for which they make application to modify by STC no. ST01086DE, as changed, continue to meet the applicable 
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provisions of the regulations listed in 
each airplane’s respective type certificate or the applicable regulations in effect on the date of application for the change except for earlier amendments as agreed upon by the FAA. 
If the Administrator finds that the 
applicable airworthiness regulations (i.e., 14 CFR part 25) do not contain 
adequate or appropriate safety standards because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16. 
Special conditions are initially 
applicable to the airplane model for which they are issued. Should the applicant apply for an STC to modify any other model included on the same type certificate to incorporate the same novel or unusual design feature, these special conditions would also apply to the other model under § 21.101. 
In addition to the applicable 
airworthiness regulations and special conditions, the airplanes modified by STC no. ST01086DE must comply with the fuel vent and exhaust emission requirements of 14 CFR part 34 and the noise certification requirements of 14 CFR part 36. 
The FAA issues special conditions, as 
defined in 14 CFR 11.19, in accordance with § 11.38, and they become part of the type certification basis under § 21.101 
Novel or Unusual Design Features 
The airplanes with STC no. 
ST01086DE will incorporate the 
following novel or unusual design feature: 
The installation of an EEL power 
supply that contains rechargeable lithium batteries. 
Discussion 
Rechargeable lithium batteries are 
considered to be a novel or unusual 
design feature in transport category airplanes, with respect to the requirements in § 25.1353. This type of battery has certain failure, operational, and maintenance characteristics that differ significantly from those of the nickel-cadmium and lead-acid rechargeable batteries currently approved for installation on transport category airplanes. These batteries introduce higher energy levels into airplane systems through new chemical compositions in various battery-cell sizes and construction. Interconnection of these cells in battery packs introduces failure modes that require unique design considerations, such as provisions for thermal management. Special Condition 1 requires that each 
individual cell within a battery be designed to maintain safe temperatures and pressures. Special Condition 2 addresses these same issues but for the entire battery. Special Condition 2 requires that the battery be designed to prevent propagation of a thermal event, such as self-sustained, uncontrolled increases in temperature or pressure from one cell to adjacent cells. 
Special Conditions 1 and 2 are 
intended to ensure that the cells and battery are designed to eliminate the potential for uncontrollable failures. However, a certain number of failures will occur due to various factors beyond the control of the designer. Therefore, other special conditions are intended to protect the airplane and its occupants if failure occurs. 
Special Conditions 3, 7, and 8 are self- 
explanatory. Special Condition 4 clarifies that the flammable-fluid fire- protection requirements of § 25.863 apply to rechargeable lithium battery installations. Section 25.863 is applicable to areas of the airplane that could be exposed to flammable fluid leakage from airplane systems. Rechargeable lithium batteries contain electrolyte that is a flammable fluid. 
Special Condition 5 requires each 
rechargeable lithium battery installation to not damage surrounding structure or adjacent systems, equipment, or electrical wiring from corrosive fluids or gases that may escape in such a way as to cause a major or more severe failure condition. Special Condition 6 requires each rechargeable lithium battery installation to have provisions to prevent any hazardous effect on airplane structure or systems caused by the maximum amount of heat it can generate due to any failure of it or its individual cells. The means of meeting special conditions 5 and 6 may be the same, but they are independent requirements addressing different hazards. Special Condition 5 addresses corrosive fluids and gases, whereas special condition 6 addresses heat. 
Special Condition 9 requires 
rechargeable lithium batteries to have ‘‘automatic’’ means, for charge rate and disconnect, due to the fast-acting nature of lithium battery chemical reactions. Manual intervention would not be timely or effective in mitigating the hazards associated with these batteries. 
These special conditions apply to all 
rechargeable lithium battery installations in lieu of § 25.1353(b)(1) through (4) at Amendment 25–123 or § 25.1353(c)(1) through (4) at earlier amendments. Those regulations remain in effect for other battery installations. These special conditions contain the 
additional safety standards that the 
Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. 
Applicability 
As discussed above, these special 
conditions are applicable to the airplane 
models listed on the approved model list (AML) of STC no. ST01086DE, which is available at rgl.faa.gov. All 
models listed in the AML must be evaluated and determined to comply with these special conditions. Additionally each new model added to the AML subsequently must also be evaluated and determined to comply with these special conditions. Should 
Peregrine apply at a later date for a change to STC no. ST01086DE to include any other model on the AML to incorporate the same novel or unusual design feature, these special conditions would apply to that model as well. Should Peregrine apply at a later date for another STC to modify any other model included on the type certificates of the models on the STC no. ST01086DE AML to incorporate the same novel or unusual design feature, these special conditions would also apply to that model as well. These special conditions are not applicable to those models in which special conditions for rechargeable lithium batteries have already been issued against the Type Certificate for that specific model. 
Conclusion 
This action only affects the 
installation of an EEL power supply that 
contains rechargeable lithium batteries on the airplane models listed on the AML of STC no. ST01086DE. It is not a rule of general applicability and affects only the applicant who will apply to the FAA for approval of these features on the airplanes. 
List of Subjects in 14 CFR Part 25 
Aircraft, Aviation safety, Reporting 
and recordkeeping requirements. Authority Citation 
The authority citation for these 
special conditions is as follows: 
Authority: 49 U.S.C. 106(f), 106(g), 40113, 
44701, 44702, 44704. 
The Special Conditions 
■Accordingly, pursuant to the authority 
delegated to me by the Administrator, 
the following special conditions are issued as part of the type certification basis for airplane models listed on the approved model list of 
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supplemental type certificate no. 
ST01086DE, as modified by Peregrine. 
In lieu of § 25.1353(b)(1) through (4) 
at amendment 25–123, or § 25.1353(c)(1) through (4) at earlier amendments, each rechargeable lithium battery installation must: 
1. Be designed to maintain safe cell 
temperatures and pressures under all foreseeable operating conditions to prevent fire and explosion. 
2. Be designed to prevent the 
occurrence of self-sustaining, uncontrollable increases in temperature or pressure, and automatically control the charge rate of each cell to protect against adverse operating conditions, such as cell imbalance, back charging, overcharging and overheating. 
3. Not emit explosive or toxic gases, 
either in normal operation or as a result of its failure that may accumulate in hazardous quantities within the airplane. 
4. Meet the requirements of § 25.863. 
5. Not damage surrounding structure 
or adjacent systems, equipment, or 
electrical wiring from corrosive fluids or gases that may escape in such a way as to cause a major or more-severe failure condition. 
6. Have provisions to prevent any 
hazardous effect on airplane structure or systems caused by the maximum amount of heat it can generate due to any failure of it or its individual cells. 
7. Have a failure sensing and warning 
system to alert the flight crew if its failure affects safe operation of the airplane. 
8. Have a monitoring and warning 
feature that alerts the flightcrew when its charge state falls below acceptable levels if its function is required for safe operation of the airplane. 
9. Have a means to automatically 
disconnect from its charging source in the event of an over-temperature condition, cell failure or battery failure. 
Note: A battery system consists of the 
battery, battery charger, and any protective 
monitoring and alerting circuitry or hardware inside or outside of the battery. It also includes vents (where necessary) and packaging. For the purpose of these special conditions, a battery and the battery system is referred to as a battery. 
Issued in Kansas City, Missouri, on January 
20, 2022. 
Patrick R. Mullen, Manager, Technical Innovation Policy 
Branch, Policy and Innovation Division, Aircraft Certification Service. 
[FR Doc. 2022–01443 Filed 1–25–22; 8:45 am] 
BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 39 
[Docket No. FAA–2022–0009; Project 
Identifier MCAI–2021–01459–R; Amendment 39–21914; AD 2022–02–17] 
RIN 2120–AA64 
Airworthiness Directives; Airbus 
Helicopters Deutschland GmbH (AHD) Helicopters 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final rule; request for 
comments. 
SUMMARY : The FAA is adopting a new 
airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model MBB–BK 117 C–2, MBB– BK 117 D–2, and MBB–BK 117 D–3 helicopters. This AD was prompted by reports of engine flame out following prolonged operations in falling snow on helicopters with an inlet barrier filter (IBF) system installed. This AD requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. 
DATES : This AD becomes effective 
February 10, 2022. 
The Director of the Federal Register 
approved the incorporation by reference of a certain publication listed in this AD as of February 10, 2022. 
The FAA must receive comments on 
this AD by March 14, 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 EASA material incorporated by 
reference (IBR) in this final rule, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may 
find this IBR material on the EASA website at https://ad.easa.europa.eu. For Airbus Helicopters service information identified in this final rule, contact Airbus Helicopters, 2701 North Forum Drive, Grand Prairie, TX 75052; telephone (972) 641–0000 or (800) 232– 0323; fax (972) 641–3775; or at https:// 
www.airbus.com/helicopters/services/ 
technical-support.html. You may view 
this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. Service information that is IBRed is also available in the AD docket at https://www.regulations.gov by searching for 
and locating Docket No. FAA–2022– 0009. 
Examining the AD Docket 
You may examine the AD docket at 
https://www.regulations.gov by 
searching for and locating Docket No. 
FAA–2022–0009; 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 final rule, the EASA AD, any comments received, and other information. The street address for Docket Operations is listed above. Comments will be available in the AD docket shortly after receipt. 
FOR FURTHER INFORMATION CONTACT : Hal 
Jensen, Aerospace Engineer, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 950 L’Enfant Plaza N SW, Washington, DC 20024; telephone (202) 267–9167; email hal.jensen@faa.gov. 
SUPPLEMENTARY INFORMATION : 
Background 
EASA, which is the Technical Agent 
for the Member States of the European Union, has issued EASA Emergency AD 2021–0289–E, dated December 23, 2021 (EASA AD 2021–0289–E), to correct an unsafe condition for all Airbus Helicopters Deutschland GmbH (AHD), formerly Eurocopter Deutschland GmbH; and Airbus Helicopters Inc., formerly American Eurocopter LLC, Model MBB–BK117 C–2, D–2, D–3, and D–3m helicopters, all variants, all serial numbers. 
This AD was prompted by reports of 
engine flame out following prolonged operations in falling snow with the IBF system installed. The FAA is issuing this AD to prevent partial icing of an IBF engine intake and engine flame out. The unsafe condition, if not addressed, could result in engine failure and reduced control of the helicopter, possibly resulting in damage to the 
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