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Federal Aviation Administration
FAA AD 2022-07-02: Rotorcraft Tail Boom
2022-07-02 .PDF FILE [Federal Register Volume 87, Number 64 (Monday, April 4, 2022)] [Rules and Regulations] [Pages 19369-19371] From the...
Federal Aviation Administration
AD 2022-01-03 Umlaut Engineering GmbH (Previously P3 Engineering)
Federal Register Volume 87, Number 20 (Monday, January 31, 2022)] [Rules and Regulations] [Pages 4797-4800] From the Federal Register...
Federal Aviation Administration
Main Drive Shaft Airworthiness Directive
[Federal Register Volume 87, Number 14 (Friday, January 21, 2022)] [Rules and Regulations] [Pages 3176-3182] From the Federal Register...
Federal Aviation Administration
FAA SB: Risk of Potential Adverse Effects on Radio Altimeters
SAIB: AIR-21-18 Date: November 2, 2021 This document contains information and recommended action. The contents of this document do not...
Federal Aviation Administration
Main Rotor System Airworthiness Directive- Request for Comment
[Federal Register Volume 86, Number 143 (Thursday, July 29, 2021)] [Rules and Regulations] [Pages 40779-40782] From the Federal Register...
Federal Aviation Administration
Rotorcraft Tail Boom Airworthiness Directive
[Federal Register Volume 86, Number 140 (Monday, July 26, 2021)] [Rules and Regulations] [Pages 39942-39949] From the Federal Register...
Federal Aviation Administration
FAA Emergency Airworthiness Directive (AD) 2021-15-52
July 8, 2021 AD #: 2021-15-52 Emergency Airworthiness Directive (AD) 2021-15-52 is sent to owners and operators of various restricted...
Federal Aviation Administration
MAIN ROTOR HUB STRAP PIN 204-012-104-005, REMOVAL FROM SERVICE
Alert Service Bulletin From Bell that effects UH-1 Fleet
Debra Jossi
GHI informational letter UH1-98-11 dated 10-7-98 - Inspection of Upper Left Hand tailboom attachment
Originally published 6/26/2014 This Letter from 1998 was submitted in relation to other posts on the blog regarding the Upper Left Hand...
Federal Aviation Administration
Proposed Rule on Main Driveshaft
Posted by the Federal Aviation Administration on Mar 25, 2021 FAA Site link for this NPRM HERE Action Notice of proposed rulemaking...
Debra Jossi
Aviation Health and Usage Monitoring Systems (HUMS) for UH-1 Industry
Huntsville, Alabama - We are pleased to introduce RMCI, Inc. and their advanced Health and Usage Monitoring Systems, or HUMS. The...
Jeff Armstrong- Rampart Helicopters
Cracked Grips on Compsite MR Blades
Composite blades PN 205-015-150-101 Rampart Helicopters sent in composite blades for biannual inspection, several cracks in the grip...
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FINALLY Lord T.T. Straps
LORD CORPORATION HAS RELEASED THEIR T.T. STRAPS FOR SALE OUTSIDE OF BELL HELICOPTER. LORD HAS BEEN MAKING THESE IDENTICAL STRAPS FOR BELL...
Peter Frinchaboy
Unintended Load Release Solution
There have been many unintended external load releases over the years and here is a simple way to reduce that number. Install this...
Federal Aviation Administration
Proposed AD - Failure of Tailboom Attaching Points
FEDERAL REGISTER LINK TO MAKE COMMENTS Action Notice of proposed rulemaking (NPRM). Summary The FAA proposes to adopt a new airworthiness...
Peter Frinchaboy
Main Rotor Drag Brace Outer Attaching Hardware
In my travels over the years I have found MANY aircraft with the main rotor outer drag brace bolt hardware incorrectly installed. General...
Peter Frinchaboy
UH-1 Main Rotor Re-torque
This has been brought up before about a re-torque after main rotor installation. In this case the TM 55-1520-210-23-1 is not a help....
Peter Frinchaboy
Mixing Lever to Scissors Lever Control Tube
I find this all the time on aircraft, another standard aircraft hardware installation, again not a standard, Huey installation, in the...
Peter Frinchaboy
Lower Fuel Cell Floor Panels
Many lower fuel cell floor panels have been damaged in removal see attached photo. These panels should be removed every 3 & 6 phase or at...
Edward C Pease and John Moore
Combustor Rumble
Combustor Rumble can be a problem in engines that reverse the combustion gas flow prior toentering the 1st stage gas producer nozzle....
Peter Frinchaboy
UH-1D/H/V Fuel System
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...
Philip Fienan
LubriBor- Fuel Lubricity Additive
NOTE FROM UH1OPS While we usually stick to maintenance articles on UH1OPS MAINTENANCE BLOGs, we support this product and after seeing the...
Peter Frinchaboy
Using the TM 55-1520-210-23P manuals
To assist those who were not military and taught how to read the TM Manuals for UH-1 Maintenance. On the text pages that go with the...
Bell Helicopter
SAIB-18-29R1 Rotorcraft Tail Boom, Attach Structure Failure
SUBJ: Rotorcraft Tail Boom, Attach Structure Failure SAIB: SW-18-29R1 Date: February 19, 2019 This is information only....
Altitude Aviation Services, LLC.
UH-1 Tailboom Motion Detection System
On September 16, 2013, about 1535 Pacific daylight time, a Garlick UH-1B, N204UH, experienced a tailboom separation while logging in...
Jon Robbins
Track and Balance - The Main Rotor for Now
Original Article: Helicopter Maintenance Magazine 2/1/2012 Before I say anything else, I want to point out that there is a lot of...
David Wilson Valley Aerospace
Dealing with Corrosion in Control Tubes/Rods
Halloween Update! Dealing with spookiest part of aging Helicopters, Corrosion! This update focuses on the importance of inspecting the...
Bell Helicopter
ASB UH-1H-18-20 Main Rotor Blades -113
ALERT SERVICE BULLETIN UH-1H-18-20 23 October 2018 MODEL AFFECTED: UH-1H SUBJECT: MAIN ROTOR BLADE 204-011-250-113, INTRODUCTION OF...
Debra Jossi
Drive Shaft Removal Tool
Do you know the P/N of the UH1 drive shaft removal tool? We have a customer looking for one and our company doesn’t have it. They stated...
David Wilson
Using Heat and Proper Alignment when Pressing Bearings into Critical Bores
This picture clearly shows the importance of using heat, and proper alignment when pressing bearings into critical bores. This damage was...
Peter Frinchaboy
TT Straps Time Life
We received a question this week in regards to time life on TT Straps retirement life. When I looked at our old component sheets, we...
Dave Wilson, Valley Aerospace, LLC
DMWR FOR ROTOR BRAKE QUILL
Our main goal when building this platform was to provide resources to the UH-1 industry. We appreciate maintenance questions sent our...
Peter Frinchaboy- David Burch Rotorbreeze 2007
Leading Edge Pitch Link Main Rotor to Mast Coupling Phenomenon
Thought this article is a good item to share. Published in Rotorbreeze 2006 by the now retired David Burch Bell Helicopter Senior...
Peter Frinchaboy
Main Rotor Retaining Nut Lock
I was contacted by a mechanic who in the process of removing a main rotor hub assembly after removing the main rotor found that the...
Peter Frinchaboy
Stabilizer Bar Adjustment
I was contacted by a mechanic that found the following when removing the stabilizer bar prior to removing the main rotor hub and blades...
Peter Frinchaboy
Collective Ground Adjustment
HAVE YOU CHECKED YOUR COLLECTIVE FRICTION LATELY? I just received a couple of photos of the set screws used to make adjustment of the...
Peter Frinchaboy
42 & 90 Degree Gearbox Caps
A couple of weeks ago I was asked to give some basic information to the maintenance man the pickup team brought with them. He hadn’t...
Peter Frinchaboy
UH-1 Maintenance Training Course
Do you have a new mechanic or mechanics that need a refresher course on the UH-1 helicopter? Do you need an IA renewal? Peter Frinchaboy...
Kevin Shields President of Trans Aero, Ltd.
Do You Really Know Your Aircraft’s Lifting Capability and Its Limitations?
Know Your Capabilities and your Limitations Scenario: You are doing a lift job with little margin. The Load calculation indicates the...
Peter Frinchaboy
Engine Igniters
In the photo below there are two Igniters, the one on the left shows that the spark is concentrated on one area of the igniter. Hard to...
Peter Frinchaboy
Servo Mount Nuts
Hi this is Pete from Metro Fire again. On the NTSB accident website there is an accident involving aircraft UH-1H N260TA 5-23-2014. There...
Robert Peterson Sunset Aviation Services
HYDRAULIC SYSTEM HEALTH & WELL BEING
With the military releasing aircraft to civilian operators, many civilian operators are following the maintenance schedule the military...
Peter Frinchaboy
Collective Bounce
I have heard of at least four aircraft in the last six months having hard landings some severe, luckily with no fatalities. In each event...
Peter Frinchaboy
Droop Cam Jack Shaft
In 1992 UH-1-92 ASAM-13 was issued that later became TB1-1520-210-19 one time & recurring inspection of the droop compensator jackshaft....
Peter Frinchaboy
Main Rotor Support and Bumpers
The military main rotor was modified with a plate bolted to the bottom of the main rotor yoke and a support bolted to the mast just above...
Altitude Aviation Services, LLC.
Recent Linear Actuator Failure
One of our operators shared the following information after one of their pilots had a linear actuator failure while fighting fires in...
Peter Frinchaboy
Fuel Line Inspection
Over the years I have seen this many times. The fuel lines that go up the back wall of the hell hole from the boost pumps to the main...
Peter Frinchaboy
UH-1 Tail Rotor Pitch Change
The Tail Rotor Pitch Change has the short manual inspection criteria for the pitch change housing ( Quill ) 204-010-775-3 and the Pitch...
Jimmy Walls
Synchronized Elevators
The purpose of the synchronized elevators is to increase the fore/aft cg range by lowering the tail as the aircraft accelerated. They did...
Peter Frinchaboy
204 Tail Rotor Pitch Change
"Tail Rotor pitch change if you still have the 204 style gearbox. In the enclosed photo the pitch change rod on the right is excessively...
