The UH-1 D, E,H, V fuel system is not a simple system. In this article I will explain how it works, identify components and how they...

As commonly known, the main beams at stations 14Left and 14Right are the foundation for the Huey structure.   These main beams run from...

I have seen many 42 deg. and 90 deg. gearbox sight glasses that get stained and the oil very dark. Many times this shows up after a...

Original Article 02/05/2018 I have heard of at least four aircraft in the last six months having hard landings some severe, luckily with...

Just a reminder that UH1OPS has a full library of UH1OPS PS Magazine related articles available as a free resource to UH-1 operations...

Know Your Capabilities and your Limitations Scenario: You are doing a lift job with little margin. The Load calculation indicates the...

As a reminder, take note that inside your main transmission, things are going round and round, such as your planetary and sun gears, just...

Compressor washes should be a routine procedure for those who maintain and operate gas turbine engines. Albeit some engineers/A&P...

This is another area to check on your Huey is the main beam. We inspect this area at least once a year. You can’t see the crack unless...

In the picture the large hose that goes from the top of the diffuser housing down to the quick disconnect at the deck bleed air manifold...

High gearbox pressure starting with the T53-L-13B resulted from an accessory gearbox housing change that was first introduced in the...

The start Fuel Nozzle pictured is not spraying fuel for start. Even if all your igniters are firing with no start fuel nozzles...

Carbon ball blasting is caused by particles of fuel that have not been completely consumed. It usually the result of fuel particles...

PS, The Preventive Maintenance Monthly is series of United States Army technical bulletins published since June 1951 as a monthly...

After knowing about this information for years I felt this is information that many may not know about, the radio active materials in the...

Pinal County Sheriff's Office selects RMCI's HUMS for its State-of-the-Art UH-1H3 Helicopter July 2024 Pinal County, Arizona – The Pinal...

A Quick Guide to Troubleshooting Hydraulic System Internal Leaks Here in my town, there is an automobile radiator repair shop with a...

One of the forgotten inspections is skid shoe’s. Many aircraft are landed on carts or ground handled in and out of hangers without...

Original Article published 4/21/2016 Aircraft Structural Repair, Inc. of Stevensville Montana recently received the STC SR02475SE for the...

Inspection of the airframe cross tube mounts is an item few people think about. They are easy to inspect by just looking at where the two...

Quick Disconnects (QD's) have caused many problems in the past. Fuel QD’s from the main fuel filter to the fuel control have failed at...

I have seen on many aircraft ( at least 20+ ) where the engine inlet to firewall clamp is installed incorrectly. This can cause corrosion...

Pilots have asked me to please do something about aircraft that have a bounce with flat pitch running on the ground. I tell them to pull...

After installation of an engine you should check engine alignment. If the engine alignment is out there may be loads imposed on the...

To assist those who were not in the military and taught how to read the TM manuals for UH-1 Maintenance.

PS Magazine, The Preventive Maintenance Monthly is series of United States Army technical bulletins published since June 1951 as a...

Previously Published in Helicopter Maintenance Magazine Posted on UH1OPS 09/29/2014 I have seen the word helicopter defined as “too many...

Originally posted 8/13/2014 Enclosed are photos of a fifth mount beam, airframe mounted with a 212 transmission installed. The cracks...

Originally posted 13 June 14 In response to UH-1 Main Beam issue: Vector has a solution that reinforces the area of the main beam, below...

On September 16, 2013, about 1535 Pacific daylight time, a Garlick UH-1B, N204UH, experienced a tailboom separation while logging in...

Originally published 6/05/2024 We are the owners of the tail boom referenced in this feed attached are a few more pictures of our...

Originally published 6/5/2014 on Uh1OPS Maintenance blog We are currently working on an AOG in Colorado to repair this area. We have a...

Originally Posted June 2014 These are photos showing a crack we found on a LH upper tailboom attach fitting. The crack was initiated at...

Originally posted 06/05/2014 I am enclosing photos of a upper tail boom attachment fitting and airframe deck & tail boom support beam....

Original Post 8/27/2018 I was contacted by a mechanic who in the process of removing a main rotor hub assembly after removing the main...

Reprint of original 4-15-2014 Blog Post In regards to the UH-1-05- ASAM-01 military message on transmission oil lines. I have personally...

Originally posted 4-15-14 on UH1OPS Blog UNCLASSIFIED . MSG DTG 202310Z JAN 05 . FROM CDRAMCOM, REDSTONE ARSENAL, AL //AMSAM-SF-A// ....

The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and...

ASB UH-1H-22-23 Page 1 of 7 Approved for public release. ALERT SERVICE BULLETINUH-1H-22-23 20 July 2022 MODEL AFFECTED:UH-1H SUBJECT:...

[Federal Register, Volume 87 Number 214 (Monday, November 7, 2022)] [Rules and Regulations] [Pages 66942-66945] From the Federal Register...

Direct Link to NEW AD https://drs.faa.gov/browse/excelExternalWindow/FR-ADFRAWD-2022-22014-0000000000.0001?modalOpened=true [Federal...

2022-07-02 .PDF FILE [Federal Register Volume 87, Number 64 (Monday, April 4, 2022)] [Rules and Regulations] [Pages 19369-19371] From the...

Federal Register Volume 87, Number 20 (Monday, January 31, 2022)] [Rules and Regulations] [Pages 4797-4800] From the Federal Register...

[Federal Register Volume 87, Number 14 (Friday, January 21, 2022)] [Rules and Regulations] [Pages 3176-3182] From the Federal Register...

SAIB: AIR-21-18 Date: November 2, 2021 This document contains information and recommended action. The contents of this document do not...

[Federal Register Volume 86, Number 143 (Thursday, July 29, 2021)] [Rules and Regulations] [Pages 40779-40782] From the Federal Register...

[Federal Register Volume 86, Number 140 (Monday, July 26, 2021)] [Rules and Regulations] [Pages 39942-39949] From the Federal Register...

July 8, 2021 AD #: 2021-15-52 Emergency Airworthiness Directive (AD) 2021-15-52 is sent to owners and operators of various restricted...

Alert Service Bulletin From Bell that effects UH-1 Fleet

Originally published 6/26/2014 This Letter from 1998 was submitted in relation to other posts on the blog regarding the Upper Left Hand...