Hamilton Sundstand — Hazardous Materials Safety Interpretation

Page 1U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration MAR 0 4 %OD8 1200 New Jersey Avenue, SE Washington, D.C. 20590 Mr. Tom Magennis Packaging Engineering Hamilton Sundstrand 1 Hamilton Road MS 2A-CC50 Windsor Locks, CT 06096 Reference No. 08-0042 Dear Mr. Magennis: This is in response to your telephone conversations with Mr. Brian Moore, of the Pipeline and Hazardous Material Safety Administration's Office of Hazardous Materials Technology, and our February 26 telephone conversation, concerning the applicability of this Hazardous Materials Regulations (HMR; 49 CFR Parts 17 1 - 180) to a Reffigerating machine intended for use aboard an aircraft. The Refrigerating machine is fitted with a non-DOT specification cylinder containing about 10 pounds of 1,1,1,1 Tetrafluoroethane (Refrigerant gas R134a), a Division 2.2 (non-flammable gas) material, and is the subject of DOT-SP 14393. Section 173.307, at paragraph (a)(4), provides that refrigerating machines containing 12 kg (25 pounds) or less of a non-flammable, non-toxic gas are not subject to the requirements of the HMR. Your company's refrigerating machines qualifL under this provision. Therefore, a special permit is not necessary. I hope this satisfies your request. If you have any further questions, please contact this office at (202) 366-8553. Sincerely, Hattie L. Mitchell Chief, Regulatory Review and Reinvention Office of Hazardous Materials Standards cc: Mr. John A. Andrea Product Line Manager Hamilton Sundstrand Corporation#

Page 2] Special permit 14393 '. Page 1 of 1 Mitchell, Hattie cPHMSA> From: MAGENNIS, TOM HS [TOM.MAGENNIS@hs.utc.com] Sent: I To: Mitchell, Hattie cPHMSA> Tuesday, February 26,2008 10:31 AM Cc: Andrea, John A HS; MAGENNIS, TOM HS Subject: Special permit 14393 Attachments: CRU 007.JPG; CRU OO6.JPG Hattie, As we discussed this morning, we are seeking to eliminate our special permit 14393 for our CRUISCU assemblies under the exception cited in CFR 49 section 173.307 (4), (i). This article exempts refrigerating machines with less than 25 Ibs of non- flammable gas, non, toxic gas to be shipped without being subject to higher level requirements. I have enclosed two pictures of the CRU unit highlighting the Flash Tank which holds the refrigerant. Please review and advise if we can proceed with out the use of special permit to ship these units. -CRU 007.JPG>> -CRU OOG.JPG>> 1'1 3 John Andrea's address is the same as mine with the exception of the MS.. John's is: 1-1-BC40 Regards, Tom Magennis Packaging Engineering Hamilton Sundstrand 1 Hamilton Road MS 2A-CC50 Windsor Locks, CT 06096 Phone (860) 654-4222 e-fax (860p622-6175#