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SERVICE LETTER 228

CESSNA 175 · Service Manual

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Overview

This service letter provides guidance for the replacement of hydraulic pumps on Cessna 172 and 175 aircraft equipped with 2100A and 2350A floats. It is intended for use by maintenance personnel and outlines the compliance requirements, background information, and detailed instructions for the replacement process. The document emphasizes the optional nature of compliance and includes information on parts and service kits available for the hydraulic pump replacement. It also provides approximate shop hours for the work involved and notes any changes to weight and balance that may result from the installation of new components.

  • This service letter applies to Cessna 172 and 175 aircraft with specific float models.
  • Hydraulic pump replacement is optional but recommended due to part discontinuation.
  • The service letter outlines the installation of new hydraulic pumps and associated parts.
  • Approximate labor hours for the replacement process are provided for planning.
  • No warranty coverage is included for labor and parts in this service letter.

Document

Source

Originally published by www.wipaire.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

View original at www.wipaire.com

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Document details

Type
·
Service Manual
Year
·
2021
Pages
·
5
File size
·
761 KB
Publisher
·
www.wipaire.com
About this document
What is the SERVICE LETTER 228?

The SERVICE LETTER 228 is a service manual for the CESSNA 175, dated 2021.

How many pages is the SERVICE LETTER 228?

The copy of the SERVICE LETTER 228 on file runs 5 pages.

Where does the SERVICE LETTER 228 come from?

This copy of the SERVICE LETTER 228 was originally published by www.wipaire.com and is hosted on Sprinkle as a free, searchable reference copy.

What year was the SERVICE LETTER 228 published?

The SERVICE LETTER 228 — the CESSNA 175 service manual on file — is dated 2021.

Documentation completeness
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In this document

Effectivity

This service letter applies to Cessna 172 and 175 aircraft equipped with 2100A and 2350A floats. Compliance with this service letter is optional.

Background

The service letter discusses the hydraulic pump replacement options available for Cessna 172 and 175 aircraft. It highlights the need for replacement due to the discontinuation of certain hydraulic pump models and provides options for new pumps.

Compliance Method

Installation of the provided parts should follow the work instructions detailed in this service letter. The instructions include steps for disconnecting and connecting hydraulic lines and ensuring proper functionality after installation.

Approximate Shop Hours

The estimated labor hours required for the hydraulic pump replacement are provided, allowing maintenance personnel to plan accordingly.

Warranty Information

This service letter does not include warranty coverage for labor and parts associated with the hydraulic pump replacement.

Full document text

WIPLINE FLOATS • SKIS • MODIFICATIONS • AIRCRAFT SALES AVIONICS • INTERIOR • MAINTENANCE • PAINT REFINISHING 1700 Henry Ave - Fleming Field (KSGS), South St. Paul, MN 55075 Phone: 651.451.1205 | Fax: 651.457.7858 www.wipaire.com SERVICE LETTER 228 Cessna 172 & 175 Hydraulic Pump Replacement on 2100A Floats & 2350A Floats Aircraft Makes/Model(s): Float Model(s): Compliance: Optional By: MAB Textron Aviation 172 Series 175 Series 2100A & 2350A Part Number: 1011867 Approved: SDW Date: 7/13/2021 Revision: A )$$DSSURYDOKDVEHHQREWDLQHGIRUWHFKQLFDOGDWDLQWKLVSXEOLFDWLRQWKDWDႇHFWV67&RU762GHVLJQFRPSOLDQFH LOG OF REVISIONS Revision Description Date A Initial release 7/13/2021 EFFECTIVITY: 7KLVVHUYLFHOHWWHUDSSOLHVWR7H[WURQ$YLDWLRQ6N\KDZNPRGHOVHULHVDQG6N\ODUNPRGHOVHULHVZLWK:LSOLQH $PSKLELDQ)ORDWVLQVWDOOHGSHU67&6$&+RU:LSOLQH$PSKLELDQ)ORDWVLQVWDOOHGSHU67&6$&+ COMPLIANCE: 2SWLRQDOFRPSOLDQFH BACKGROUND: 7H[WURQ$YLDWLRQ &HVVQD  +\GUDXOLF3XPS$VVHPEO\9'&SQ$DQG+\GUDXOLF3XPS$VVHPEO\ 9'&SQ$KDYHERWKEHHQGLVFRQWLQXHG7KLVVHUYLFHOHWWHUSURYLGHVWKHRSWLRQWRUHSODFHWKHPZLWKSXPSVSQ IRUWKH9'&RUIRUWKH9'& COMPLIANCE METHOD: ,QVWDOOSURYLGHGSDUWVDVVKRZQLQWKH:RUN,QVWUXFWLRQVHFWLRQRIWKLVVHUYLFHOHWWHU APPROXIMATE SHOP HOURS: 7KHZRUNLQVWUXFWLRQIRUWKLVVHUYLFHOHWWHUZLOOWDNHDSSUR[LPDWHO\ODERUKRXUV WEIGHT AND BALANCE CHANGE: /%6)6 WARRANTY INFORMATION: 7KLVVHUYLFHOHWWHUGRHVQRWLQFOXGHZDUUDQW\IRUODERUDQGSDUWV TECHNICAL DATA: &RSLHVRIWKLVVHUYLFHOHWWHUDVVRFLDWHGVHUYLFHNLW LIDSSOLFDEOH ÀRDWVHUYLFHPDQXDODQGÀRDWSDUWVPDQXDODUHDYDLODEOHDW ZZZZLSDLUHFRP 5HYLVLRQ$ 3DJHRI 31  6(59,&(/(77(5  &HVVQD +\GUDXOLF3XPS5HSODFHPHQWRQ$)ORDWV $)ORDWV ITEMS PROVIDED IN SERVICE KIT 1011867-01 (12 VDC HYDRAULIC PUMP ONLY) ITEM QTY PART NUMBER DESCRIPTION 1 1  $66(0%/<+<'5$8/,&32:(53$&.9 2 1 1011851 63$&(5,167$//$7,21+<'5$8/,&32:(53$&. 3 2 $1$ %2/7*5,381'5,//('67((/   1$6)3 :$6+(5,'7+.67((/ 5 2 061 1875(*8/$5+(,*+781) ITEMS PROVIDED IN SERVICE KIT 1011867-02 (24 VDC HYDRAULIC PUMP ONLY) ITEM QTY PART NUMBER DESCRIPTION 1 1 1011850 $66(0%/<+<'5$8/,&32:(53$&.9 2 1 1011851 63$&(5,167$//$7,21+<'5$8/,&32:(53$&. 3 2 $1$ %2/7*5,381'5,//('67((/   1$6)3 :$6+(5,'7+.67((/ 5 2 061 1875(*8/$5+(,*+781) DISCONTINUED 12 VDC HYDRAULIC PUMP 21A09000-239 NEW 12 VDC HYDRAULIC PUMP 1011849 12 VDC PUMP ONLY DISCONTINUED 24 VDC HYDRAULIC PUMP 21A09000-283 NEW 24 VDC HYDRAULIC PUMP 1011850 24 VDC PUMP ONLY 5HYLVLRQ$ 3DJHRI 31  6(59,&(/(77(5  &HVVQD +\GUDXOLF3XPS5HSODFHPHQWRQ$)ORDWV $)ORDWV 5HYLVLRQ$ 3DJHRI 31  6(59,&(/(77(5  &HVVQD +\GUDXOLF3XPS5HSODFHPHQWRQ$)ORDWV $)ORDWV Work Instructions 12 VDC Hydraulic Pump Only 'LVFRQQHFWDLUFUDIWEDWWHU\ 'LVFRQQHFWVLQJOHSLQ0ROH[FRQQHFWRUIRU*$ZLUH 'LVFRQQHFWSLQ&3&FRQQHFWRUIURPK\GUDXOLFSRZHUSDFNDVVHPEO\$ ,IDLUFUDIWKDVDK\GUDXOLFORZOHYHOZDUQLQJV\VWHPGLVFRQQHFWZLUHKDUQHVVIURPVHQVRULQUHVHUYRLU 'UDLQK\GUDXOLFÀXLGIURPK\GUDXOLFSRZHUSDFNUHVHUYRLU 'LVFRQQHFWDQGFDS$K\GUDXOLFOLQHIURPUHVHUYRLUWR¿UHZDOOEXONKHDG¿WWLQJ 'LVFRQQHFWDQGFDS$K\GUDXOLFOLQHVIURPSXPSXSDQGGQSRUWVWR¿UHZDOOEXONKHDG¿WWLQJV 8QEROWDQGUHPRYHK\GUDXOLFSRZHUSDFN$IURP¿UHZDOO ,QVWDOOQHZK\GUDXOLFSRZHUSDFNRQWRH[LVWLQJDQJOH$ZLWKVSDFHUEHWZHHQSXPSDQG DQJOH8VHVXSSOLHGKDUGZDUHWRPRXQWSXPSWRDQJOH8VHH[LVWLQJKDUGZDUHWRPRXQWXSSHUSODWHWKURXJK¿UHZDOO 5HLQVWDOOK\GUDXOLFOLQHV$RQWRSXPSPDQLIROGXSDQGGQSRUWV 5HLQVWDOOK\GUDXOLFOLQHV$WRSXPSUHVHUYRLU¿WWLQJ ,IDLUFUDIWKDVDK\GUDXOLFORZOHYHOZDUQLQJV\VWHPUHFRQQHFWZLUHKDUQHVVWRVHQVRULQQHZUHVHUYRLU 5HLQVWDOOSLQ&3&FRQQHFWRU6HHHOHFWULFDOVFKHPDWLF &XWVLQJOHSLQ0ROH[FRQQHFWRUIURP*$ZLUH,QVWDOO)1/FRQQHFWRURQWR*$ZLUH&RQQHFW*$ZLUHWR  SRZHUZLUHRQK\GUDXOLFSXPSDVVHPEO\5XQJURXQGZLUHIURPK\GUDXOLFSXPSWRJURXQGRQDLUFUDIW6HHHOHFWULFDO  VFKHPDWLF 5HFRQQHFWDLUFUDIWEDWWHU\VHUYLFHSXPSUHVHUYRLUZLWK0,/+K\GUDXOLFÀXLGDQGSHUIRUPDUHWUDFWLRQH[WHQVLRQWHVW WRPDNHVXUHV\VWHPLVIXQFWLRQLQJFRUUHFWO\:DWFKWKHV\VWHPIRUOHDNVDQGDGG0,/+K\GUDXOLFÀXLGDVQHHGHG 24 VDC Hydraulic Pump Only 'LVFRQQHFWDLUFUDIWEDWWHU\ 'LVFRQQHFWVLQJOHSLQ0ROH[FRQQHFWRUIRU*$ZLUH 'LVFRQQHFWSLQ&3&FRQQHFWRUIURPK\GUDXOLFSRZHUSDFNDVVHPEO\$ ,IDLUFUDIWKDVDK\GUDXOLFORZOHYHOZDUQLQJV\VWHPGLVFRQQHFWZLUHKDUQHVVIURPVHQVRULQUHVHUYRLU 'UDLQK\GUDXOLFÀXLGIURPK\GUDXOLFSRZHUSDFNUHVHUYRLU 'LVFRQQHFWDQGFDS$K\GUDXOLFOLQHIURPUHVHUYRLUWR¿UHZDOOEXONKHDG¿WWLQJ 'LVFRQQHFWDQGFDS$K\GUDXOLFOLQHVIURPSXPSXSDQGGQSRUWVWR¿UHZDOOEXONKHDG¿WWLQJV 8QEROWDQGUHPRYHK\GUDXOLFSRZHUSDFN$IURP¿UHZDOO ,QVWDOOQHZK\GUDXOLFSRZHUSDFNRQWRH[LVWLQJDQJOH$ZLWKVSDFHUEHWZHHQSXPSDQG DQJOH8VHVXSSOLHGKDUGZDUHWRPRXQWSXPSWRDQJOH8VHH[LVWLQJKDUGZDUHWRPRXQWXSSHUSODWHWKURXJK¿UHZDOO 5HLQVWDOOK\GUDXOLFOLQHV$RQWRSXPSPDQLIROGXSDQGGQSRUWV 5HLQVWDOOK\GUDXOLFOLQHV$WRSXPSUHVHUYRLU¿WWLQJ

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