# STC SA4-591

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Alaska Coastal Airlines, United States
- Description: Increased maximum weight capacity of bow compartment.
- Applied: May 9, 1958
- Status date: July 17, 2008
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: TCDS 654
- Certificate PDF: https://openairdocs.org/files/sha256/1c/54/1c54ddecd132b6d574eba8bf64ff600e2a074e6b91fc6b6546802e906b0e35ba
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC4B554797A9CA2B862576CE00763BE3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-591

## ADs that name it (0)

None.

## Approved models (2)

- Grumman American Aviation Corporation G-21 (TCDS 654)
- Grumman American Aviation Corporation G-21A (TCDS 654)

## 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.

lCSDO-33 REGION5 , 0 •••• AICA-Z.11 i7.!h i .J . S. O£P ••~ ''"'Eo.; r 0' CO_Eke£:

(1 ,l~ AE~O"""l .• iCS •. OWl"": jT" ..•.rl ...J •••• M!4Y ~) r!~)5'Fgr.AllprOr,d .••• d,.t Bur •••• No 41 •.l111J

1. !'tAME -VOl' "OGRESS 01 ,,;;'P,-ICA"'~ .-'*'-- .•.. '--, 1___ L .

I SUPPLEMfHTAL TYPE CERT/!'FICATEI

j) $ - Suc:.1 t ! r. trllli lcats to 10- l~tluD Sa!et., Alent. Copy _111 to appl1cant upon 1 •• u&Oce.

APPLIED ~OR:

;---.:..X-. • I ~ •• H • I __ f" (.I"", E: f1J -'0,.[L;" f II ORt".",,,l.. ••••r,DL. Dj.rt:..;,...•r".~ J G-2lA ("...-an) "t:* ••Ol'f LOt,.. I .t..r I ~. : ~eHifittite Alaska Coastal Airlines 2 Marine Way Juneau, Alaska on---Increased maximum weight capacity of bow compartment of Grumman G-2LA aircraft in accordance with Alaska Coastal Airlines Report No. GS58-l UMITATION OF APPLICABILITY. This approval should not be extended to other specific airplanes of'this model on which other previously approved modi.f:tcations are incorporated unless it is determimd that tm interrelationship between this change and any o.f those other previousl.y approved modifications will introd'OOe no adverse effect upon the airworthiness of that airplane.

,. ;:E.::"~RIPll(jN nf' CHA"G~ -----------------------_ .._-~._--- Data is on file in the Aircraft l!:ruP.neering Division, CAA, Region I V, Los Angeles,Ca1.i.fomia.

Alaska Coastal Airlines Report ~. GS58-1.

5. S I QoIATURE AND r 1 TLE Rt "toG ~uCATION !)f OA;"

[J NO [;J 1'10YES rI r,-£ LL YES I I \ /\ I, I ~ C<\.(v... C/~ == ,~_c'.

\~~. , -~J;t-Yo. F. BENECKE " a<,uiJlt£ Co-Manager TO IE COM'LETlO IY CA.6.

"PPL I CAN r 0~ ••~ r' •.. I C A ~ , v •••:..•• T£ May 9. 1958 i I:' Certifi cation Basis: Bulletin 7A.

" ""4 TUI!£ 9rfgfni~1 'tig::;c;ci till;

w:.~.1(lf/cnf!

n. ;(11.h'sei' Chief, .l\ircraft Engineering Division Td,.

I'",0.'"'' II I I !._-----------_._-- ..• Cl~l i' I '-4H6St.

hP, :. SA1'-59-t"0 '.1: •••••• ; "' •.

..: •• I \.:,.,. .•••L T t P E Jf .~" ~'lJ' Al september 1.:'),1958 -----.-.- -------_. __."

r I r L l co••••••.uc J2"84 '0"'"' ACA-2.17 (7.561

## Every issue (2)

- July 17, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/1c/54/1c54ddecd132b6d574eba8bf64ff600e2a074e6b91fc6b6546802e906b0e35ba)
- January 1, 1958: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/29/65/2965435f79b5a22c4ba35f5fd8c436ac727ea04476fb58f23134a66676d00eb0)

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