Peter Frinchaboy
Collective Bounce
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...
Debra Jossi
Button 'Em Up!
Just a reminder that UH1OPS has a full library of UH1OPS PS Magazine related articles available as a free resource to UH-1 operations...
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...
Joe Trevino
Transmission Notes
As a reminder, take note that inside your main transmission, things are going round and round, such as your planetary and sun gears, just...
Colin Kilmaster
Compressor Washes
Compressor washes should be a routine procedure for those who maintain and operate gas turbine engines. Albeit some engineers/A&P...
Peter Frinchaboy
Main Beam
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...
Peter Frinchaboy
Bleed Air Hose
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...
Edward C Pease
Gear Box Pressure T53
High gearbox pressure starting with the T53-L-13B resulted from an accessory gearbox housing change that was first introduced in the...
Peter Frinchaboy
Start Fuel Nozzle
The start Fuel Nozzle pictured is not spraying fuel for start. Even if all your igniters are firing with no start fuel nozzles...
Edward C Pease
Carbon Ball Blasting
Carbon ball blasting is caused by particles of fuel that have not been completely consumed. It usually the result of fuel particles...
Debra Jossi
PS Magazine
PS, The Preventive Maintenance Monthly is series of United States Army technical bulletins published since June 1951 as a monthly...
Peter Frinchaboy
Radio Active Materials in T53 Engine
After knowing about this information for years I felt this is information that many may not know about, the radio active materials in the...
RMCI, Inc
Pinal County Sheriff's Office selects RMCI's HUMS for its State-of-the-Art UH-1H3 Helicopter
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...
Robert Peterson, Sunset Aviation Services
Troubleshooting Hydraulic Leaks
A Quick Guide to Troubleshooting Hydraulic System Internal Leaks Here in my town, there is an automobile radiator repair shop with a...
Peter Frinchaboy
Skid Shoe Inspection
One of the forgotten inspections is skid shoe’s. Many aircraft are landed on carts or ground handled in and out of hangers without...
Altitude Aviation Services, LLC.
UH-1H Tailboom Motion Detection System Receives STC approval #SR02475SE.
Original Article published 4/21/2016 Aircraft Structural Repair, Inc. of Stevensville Montana recently received the STC SR02475SE for the...
Peter Frinchaboy
Landing Gear Airframe Saddle Mounts
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...
Peter Frinchaboy
Quick Disconnects
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...
Peter Frinchaboy
Engine Inlet to Firewall Clamp
I have seen on many aircraft ( at least 20+ ) where the engine inlet to firewall clamp is installed incorrectly. This can cause corrosion...
Peter Frinchaboy- David Burch Rotorbreeze 2007
Collective Bounce
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...
Peter Frinchaboy
Compressor Stalls
After installation of an engine you should check engine alignment. If the engine alignment is out there may be loads imposed on the...
Peter Frinchaboy
Using the TM 55-1520-210-23P manuals
To assist those who were not in the military and taught how to read the TM manuals for UH-1 Maintenance.
Debra Jossi
PS Magazine Tail Boom Tips
PS Magazine, The Preventive Maintenance Monthly is series of United States Army technical bulletins published since June 1951 as a...
Bob Peterson
Hydraulic Fluid Dialysis- Why It Is Good For Your Helicopter
Previously Published in Helicopter Maintenance Magazine Posted on UH1OPS 09/29/2014 I have seen the word helicopter defined as “too many...
Peter Frinchaboy
Fifth Mount Beam
Originally posted 8/13/2014 Enclosed are photos of a fifth mount beam, airframe mounted with a 212 transmission installed. The cracks...
John Jongema
UH-1 Main Beam Reinforcement Solution
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...
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...
Dennis Pederson
LH Tailboom Fitting cracked
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...
John Jongema
Upper LH Tailboom Longeron
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...
Jon Robbins
TAIL BOOM FITTING CRACK- Cal Fire
Originally Posted June 2014 These are photos showing a crack we found on a LH upper tailboom attach fitting. The crack was initiated at...
Peter Frinchaboy
Tail boom Crack
Originally posted 06/05/2014 I am enclosing photos of a upper tail boom attachment fitting and airframe deck & tail boom support beam....
Peter Frinchaboy
Main Rotor Retaining Nut Lock
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...
Peter Frinchaboy
UH-1 Transmission Oil Lines
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...
Federal Aviation Administration
UH-1-05-ASAM-01 Transmission Oil Line System QD
Originally posted 4-15-14 on UH1OPS Blog UNCLASSIFIED . MSG DTG 202310Z JAN 05 . FROM CDRAMCOM, REDSTONE ARSENAL, AL //AMSAM-SF-A// ....
Federal Aviation Administration
FAA AD 2022-20-14: Main Rotor Gearbox
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and...
Bell Helicopter
ASB UH-1H-22-23 TAILBOOM ATTACHMENT HARDWARE
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 Aviation Administration
AD 2022-22-12-AD was prompted by reports of two in-service failures of forward crosstubes
[Federal Register, Volume 87 Number 214 (Monday, November 7, 2022)] [Rules and Regulations] [Pages 66942-66945] From the Federal Register...
Federal Aviation Administration
FAA AD 2022-21-11: Main rotor blades
Direct Link to NEW AD https://drs.faa.gov/browse/excelExternalWindow/FR-ADFRAWD-2022-22014-0000000000.0001?modalOpened=true [Federal...
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...
