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###### Department of Transportation

###### Federal Aviation Administration

          - 14 CFR Part 39
          - [Docket No. FAA-2014-0848; Directorate Identifier 2014-CE-031-AD; Amendment 39-18055; AD 2014-26-04]
          - RIN 2120-AA64

# AGENCY:

Federal Aviation Administration (FAA), Department of Transportation (DOT).

# ACTION:

Final rule.

# SUMMARY:

We are adopting a new airworthiness directive (AD) for certain  GROB-WERKE Models G115EG and G120A airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a defective starter solenoid. We are issuing this AD to require actions to address the unsafe condition on these products.

# DATES:

This AD is effective February 9, 2015.

The Director of the Federal Register approved the incorporation by reference of certain publication listed in the AD as of February 9, 2015.

# ADDRESSES:

You may examine the AD docket on the Internet at *http://www.regulations.gov* by searching for and locating Docket No. FAA-2014-0848; or in person at Document Management Facility, U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

For service information identified in this AD, contact Grob Aircraft AG, Customer Service, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies, Germany, telephone: + 49 (0) 8268-998-105; fax: + 49 (0) 8268-998-200; email: *productsupport@grob-aircraft.com*; Internet: *grob-aircraft.com*. You may view this referenced service information at the FAA, Small Airplane Directorate, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call (816) 329-4148.

# FOR FURTHER INFORMATION CONTACT:

Karl Schletzbaum, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4123; fax: (816) 329-4090; email: *karl.schletzbaum@faa.gov*.

# SUPPLEMENTARY INFORMATION:

## Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain GROB-WERKE Models G115EG and G120A airplanes. The NPRM was published in the **Federal Register** on October 23, 2014 (79 FR 63340). The NPRM proposed to correct an unsafe condition for the specified products and was based on mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country. The MCAI states:

An operator of a G 115E aeroplane experienced a total loss of electrical power in flight. The root cause was found to be a defective starter solenoid causing an internal short circuit, which resulted in breakdown of the system voltage.

This condition, if not detected and corrected, could result in reduced control of the aeroplane.

To address this potential unsafe condition, GROB Aircraft AG issued Service Bulletin (SB) MSB1078-196 for G 115 aeroplanes and SB MSB1121-144 for G 120 aeroplanes to provide instructions for inspection and corrective action.

For the reason described above, this AD requires a one-time inspection of the starter solenoid and, depending on the findings, replacement of the starter.

A technical solution is currently under development and further AD action may follow.

The MCAI can be found in the AD docket on the Internet at *http://www.regulations.gov/​#!documentDetail;​D=​FAA-2014-0848-0002.*

## Comments

We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM (79 FR 63340, October 23, 2014) or on the determination of the cost to the public.

## Conclusion

We reviewed the relevant data and determined that air safety and the public interest require adopting the AD as proposed except for minor editorial changes. We have determined that these minor changes:      ( print page 156)    
    - Are consistent with the intent that was proposed in the NPRM ( 79 FR 63340 , October 23, 2014) for correcting the unsafe condition; and
    - Do not add any additional burden upon the public than was already proposed in the NPRM ( 79 FR 63340 , October 23, 2014).

## Interim Action

We consider this AD interim action. GROB Aircraft is currently working on a final technical solution to resolve the unsafe condition. If final action is later identified, we might consider further rulemaking.

## Costs of Compliance

We estimate that this AD will affect 6 products of U.S. registry. We also estimate that it will take about 4 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $85 per work-hour.

Based on these figures, we estimate the cost of this AD on U.S. operators to be $2,040, or $340 per product.

In addition, we estimate that any necessary follow-on actions will take about 4 work-hours and require parts costing $600, for a cost of $940 per product. We have no way of determining the number of products that may need these actions.

## 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.

We are 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

We determined that this AD will not have federalism implications under Executive Order 13132. This AD will 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 AD:

(1) Is not a “significant regulatory action” under Executive Order 12866,

(2) Is not a “significant rule” under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979),

(3) Will not affect intrastate aviation in Alaska, and

(4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

## Examining the AD Docket

You may examine the AD docket on the Internet at *http://www.regulations.gov* by searching for and locating Docket No. FAA-2014-0848; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains the NPRM, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone (800) 647-5527) is in the **ADDRESSES** section. Comments will be available in the AD docket shortly after receipt.

# List of Subjects in 14 CFR Part 39

      - Air transportation
      - Aircraft
      - Aviation safety
      - Incorporation by reference
      - Safety

## Adoption of the Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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 

2. The FAA amends § 39.13 by adding the following new AD: 

**2014-26-04 GROB-WERKE:** Amendment 39-18055; Docket No. FAA-2014-0848; Directorate Identifier 2014-CE-031-AD.

## (a) Effective Date

This airworthiness directive (AD) becomes effective February 9, 2015.

## (b) Affected ADs

None.

## (c) Applicability

This AD applies to GROB-WERKE Model G115EG airplanes, all serial numbers through 82323/E, and Model G120A airplanes, all serial numbers through 85063, certificated in any category.

## (d) Subject

Air Transport Association of America (ATA) Code 80: Starting.

## (e) Reason

This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a defective starter solenoid. We are issuing this AD to detect and correct defective starter solenoids, which could cause an internal short circuit and could result in reduced control.

##  (f) Actions and Compliance

Unless already done, do the actions in paragraphs (f)(1) and (f)(2) of this AD:

(1) Within the next 30 days after February 9, 2015 (the effective date of this AD), inspect the starter following the Accomplishment Instructions in GROB Aircraft Service Bulletin No. MSB1078-196, dated July 14, 2014, or GROB Aircraft Service Bulletin No. MSB1121-144, dated July 14, 2014, as applicable.

(2) If any damage is found on the starter during the inspection required in paragraph (f)(1) of this AD, before further flight, replace the starter with a serviceable part. Do the replacement following the Accomplishment Instructions in GROB Aircraft Service Bulletin No. MSB1078-196, dated July 14, 2014, or GROB Aircraft Service Bulletin No. MSB1121-144, dated July 14, 2014, as applicable.

## (g) Other FAA AD Provisions

The following provisions also apply to this AD:

(1) *Alternative Methods of Compliance (AMOCs):* The Manager, Standards Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Karl Schletzbaum, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4123; fax: (816) 329-4090; email: *karl.schletzbaum@faa.gov*. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO.

(2) *Airworthy Product:* For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service.

## (h) Related Information

Refer to MCAI European Aviation Safety Agency (EASA) AD No. 2014-0212, dated September 19, 2014, for related information. You may examine the MCAI on the Internet at *http://www.regulations.gov/​#!documentDetail;​D=​FAA-2014-0848-0002*.      ( print page 157)    

## (i) 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) GROB Aircraft Service Bulletin No. MSB1078-196, dated July 14, 2014.

(ii) GROB Aircraft Service Bulletin No. MSB1121-144, dated July 14, 2014.

(3) For GROB Aircraft AG service information identified in this AD, contact Grob Aircraft AG, Customer Service, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies, Germany, telephone: + 49 (0) 8268-998-105; fax; + 49 (0) 8268-998-200; email: *productsupport@grob-aircraft.com*; Internet: *grob-aircraft.com*.

(4) You may view this service information at the FAA, Small Airplane Directorate, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call (816) 329-4148. In addition, you can access this service information on the Internet at *http://www.regulations.gov* by searching for and locating Docket No. FAA-2014-0848.

(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, call 202-741-6030, or go to: *http://www.archives.gov/​federal-register/​cfr/​ibr-locations.html.*

Issued in Kansas City, Missouri, on December 22, 2014.

Robert Busto,

Acting Manager, Small Airplane Directorate, Aircraft Certification Service.

[FR Doc. 2014-30489 Filed 1-2-15; 8:45 am]

BILLING CODE 4910-13-P