# STC SH4746NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Erickson Air Crane Inc. dba Erickson Air-Crane, United States
- Description: Use of Mobil Oil Corp. 'Mobilgrease 28' synthetic grease to lubricate the main rotor head, swash plate and various associated linkages.
- Applied: March 8, 1989
- Status date: March 1, 2001
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 29
- Data sheets: [TCDS H6EA](https://openairdocs.org/tcds/H6EA)
- Certificate PDF: https://openairdocs.org/files/sha256/7d/f7/7df7aa107ff68de611b22c563ad7b11663c85538d4713a09f5547841823af427
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FD976C9FDC795905862579C2004F0C40.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH4746NM

## ADs that name it (0)

None.

## Approved models (1)

- Erickson Air-Crane Company S-64E ([TCDS H6EA](https://openairdocs.org/tcds/H6EA))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Number SH4746NM This certificate, issued to Erickson Air-Crane, Inc.

dba Erickson Air-Crane 3100 Willow Springs Road Central Point, OR 97502 Part 29 of the Federal Aviation Regulations.

Original ProductType Certificate Number: H6EA Make: Erickson Model: S-64E Description of the Type Design Change: Use of Mobil Oil Corporation “MOBILGREASE 28” synthetic grease to lubricate the main rotor head, swash plate and various associated linkages, in place of the previously approved grease or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model rotorcraft only.

This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer, that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this Certificate must be maintained as part of the permanent records for the modified rotorcraft. (See “Continuation Sheet”, Page 3)

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application: March 8, 1989 Date reissued: 08/22/97; 03/01/01 Date of issuance: July 21, 1989 Date amended: 05/01/90; 03/06/91; 03/01/01

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

Number SH4746NM

Erickson Air-Crane, Inc.

dba Erickson Air-Crane

Reissued: 08/22/97; 03/01/01 Amended: 05/01/90; 03/06/91; 03/01/01

Limitations and Conditions: (cont’d)

The conditions and limitations of the Type Certificate Data Sheet No. H6EA apply except where superseded by the following:

This Continuation Sheet, which is part of STC No. SH4746NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Aviation Regulations.

Mobile Oil Corporation “MOBILGREASE 28” may be used in place of the MILSPEC MIL-G-25537 grease called out in the Technical Manual TM 55-1520-217-23-1-1.

-END-

## Every issue (1)

- March 1, 2001: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7d/f7/7df7aa107ff68de611b22c563ad7b11663c85538d4713a09f5547841823af427)

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