# Page 405 of 434

**Page 2-1-U1**

**ASD-STE100 Simplified Technical English**

|**Word**<br>**(part of speech)**|**Approved meaning/**<br>**ALTERNATIVES**|**STE EXAMPLE**|**Non-STE example**|
|---|---|---|---|
|**under (prep) — UNNAPPROVED**|BELOW (prep)|INSTALL THE CABLE<br>THROUGH THE GUIDE<br>TUBE BELOW THE<br>CABIN FLOOR.|Install the cable through<br>the guide tube under the<br>cabin floor.|
|||IN (prep)|THIS RESULT CAN<br>OCCUR IN DIFFERENT<br>CONDITIONS.|This result can occur<br>under different<br>conditions.|
|||LESS THAN|MAKE SURE THAT THE<br>PRESSURE IS LESS<br>THAN 30 psi.|<br>Make sure the pressure<br>is under 30 psi.|
|**underneath (prep) — UNNAPPROVED**|BELOW (prep)|PUT THE CONTAINER<br>BELOW THE DRAIN<br>VALVE.|Place the container<br>underneath the drain<br>valve.|
|**underside (n) — UNNAPPROVED**|BOTTOM (n)|EXAMINE THE FOUR<br>ATTACHING HOLES<br>ON THE BOTTOM.|Examine the four<br>attaching holes on the<br>underside.|
|**undertake (v) — UNNAPPROVED**|DO (v)<br>You can use a<br>more accurate<br>verb.|DO THIS TASK IN AN<br>AREA THAT HAS<br>GOOD AIRFLOW.|Undertake this task in an<br>area that has good<br>airflow.|
|||START (v)|DO NOT START THE<br>TEST WITHOUT<br>PRECAUTIONS.|Do not undertake the<br>test without precautions.|
|**undo (v) — UNNAPPROVED**|LOOSEN (v)|LOOSEN THE BOLTS<br>THAT ATTACH THE<br>UNIT.|Undo the bolts that<br>attach the unit.|
|**undue (adj) — UNNAPPROVED**|UNWANTED (adj)|TO PREVENT<br>UNWANTED FRICTION,<br>POLISH THE<br>SURFACE.|To prevent undue<br>friction, polish the<br>surface.|
|**uneven (adj) — UNNAPPROVED**|EQUAL (adj)|MAKE SURE THAT THE<br>FUEL LOAD IS EQUAL<br>ON EACH SIDE OF THE<br>AIRCRAFT<br>CENTERLINE.|<br> <br>Avoid uneven fuel load<br>about the aircraft<br>centerline.|
|||ROUGH (adj)|IF THE SURFACE IS<br>ROUGH, REPLACE<br>THE SLIDE VALVE.|Replace the slide valve if<br>its surface is uneven.|

# Page 406 of 434

**Page 2-1-U2**

**Part 2 - Dictionary**

**Issue 9 2025-01-15**

**ASD-STE100 Simplified Technical English**

|**Word**<br>**(part of speech)**|**Approved meaning/**<br>**ALTERNATIVES**|**STE EXAMPLE**|**Non-STE example**|
|---|---|---|---|
|**UNFOLD (v),**<br>**UNFOLDS,**<br>**UNFOLDED,**<br>**UNFOLDED**|To open or to straighten<br>or to cause to open or to<br>straighten from a folded<br>position or condition|UNFOLD THE<br>SHEETING<br>CAREFULLY.||
||||MAKE SURE THAT THE<br>INDICATOR LIGHT<br>COMES ON WHEN THE<br>BLADES UNFOLD.||
|**uniform (adj) — UNNAPPROVED**|CONSTANT (adj)|CURE THE SEALANT<br>AT A CONSTANT<br>TEMPERATURE.|Cure the sealant at a<br>uniform temperature.|
|||EQUAL (adj)|THE FUEL LOAD MUST<br>BE EQUAL ON EACH<br>SIDE OF THE<br>AIRCRAFT<br>CENTERLINE.|The fuel load must be<br>uniform on each side of<br>the aircraft centerline.|
|**uniformly (adv) — UNNAPPROVED**|EQUALLY (adv)|MAKE SURE THAT THE<br>TWO PISTONS<br>EXTEND EQUALLY.|Make sure that the two<br>pistons extend uniformly.|
|**unintentional (adj) — UNNAPPROVED**|ACCIDENTAL (adj)|A GUARD ON THE<br>CONTROL SWITCH OF<br>THE PUMP PREVENTS<br>ACCIDENTAL<br>OPERATION.|A guard on the control<br>switch of the pump<br>prevents unintentional<br>operation.|
|**unintentionally**<br>**(adv)**|ACCIDENTALLY (adv)|IF YOU<br>ACCIDENTALLY<br>SPRAY RAIN<br>REPELLENT FLUID<br>ONTO A DRY<br>WINDSHIELD,<br>REMOVE THE FLUID<br>WITH SOLVENT.|If rain repellent fluid is<br>unintentionally sprayed<br>onto a dry windshield,<br>remove the fluid with<br>solvent.|
|**UNIT (n)**|1.<br>Equipment that<br>does a function|YOU CAN REPLACE A<br>LARGE NUMBER OF<br>UNITS DURING THIS<br>REPAIR PROCEDURE.||
|||2.<br>A quantity that is a<br>standard of<br>measurement|THIS MANUAL USES<br>SI UNITS.||
|**UNKNOWN (adj)**|Not known|DO NOT USE FUEL<br>WITH UNKNOWN<br>PROPERTIES.||

**Issue 9 2025-01-15**

**Part 2 - Dictionary**

# Page 407 of 434

**Page 2-1-U3**

**ASD-STE100 Simplified Technical English**

|**Word**<br>**(part of speech)**|**Approved meaning/**<br>**ALTERNATIVES**|**STE EXAMPLE**|**Non-STE example**|
|---|---|---|---|
|**unlatch (v) — UNNAPPROVED**|RELEASE (v)|THE SWITCH MUST<br>RELEASE.|Switch must unlatch.|
|||OPEN (v)|THE SWITCH MUST<br>OPEN.|Switch must unlatch.|
|**UNLESS (conj)**|Except if|DO NOT REMOVE THE<br>ADAPTER FROM THE<br>STABILIZER UNLESS A<br>REPAIR IS<br>NECESSARY.||
|**unload (v) — UNNAPPROVED**|RELEASE (v)|RELEASE THE SPRING<br>TENSION.|Unload the spring<br>tension.|
|||LOAD (TN)|REMOVE THE LOAD<br>FROM THE SPRING<br>BALANCE.|Unload the spring<br>balance.|
|**UNLOCK (v),**<br>**UNLOCKS,**<br>**UNLOCKED,**<br>**UNLOCKED**|To release or become<br>released from a locked<br>condition|BEFORE YOU UNLOCK<br>THE DOOR, MAKE<br>SURE THAT THE<br>CABIN DIFFERENTIAL<br>PRESSURE IS ZERO.||
||||IF THE LEVER<br>UNLOCKS DURING<br>THE TEST, SET THE<br>LEVER TO THE<br>LOCKED POSITION<br>AGAIN.||
|**unnecessary (adj) — UNNAPPROVED**|NOT NECESSARY|REMOVE THE<br>GROUND EQUIPMENT<br>THAT IS NOT<br>NECESSARY.|Remove the<br>unnecessary ground<br>equipment.|
|**unobstructed (adj) — UNNAPPROVED**|CLOGGED (adj)|MAKE SURE THAT THE<br>DRAIN OPENINGS ARE<br>NOT CLOGGED.|<br>Make sure that the drain<br>openings are<br>unobstructed.|
|||CLEAR (adj)|AN ATTENDANT MUST<br>HAVE A CLEAR VIEW<br>OF THE PERSON IN<br>THE TANK.|An attendant must have<br>an unobstructed view of<br>the person in the tank.|
|**unpack (v) — UNNAPPROVED**|REMOVE (v)|REMOVE THE PARTS<br>FROM THE SHIPPING<br>CONTAINER.|Unpack the shipping<br>container.|
|**unpainted (adj) — UNNAPPROVED**|BARE (adj)|APPLY PROTECTIVE<br>TREATMENT ON THE<br>BARE SURFACES.|Protect the unpainted<br>surfaces.|

# Page 408 of 434

**Page 2-1-U4**

**Part 2 - Dictionary**

**Issue 9 2025-01-15**

**ASD-STE100 Simplified Technical English**

|**Word**<br>**(part of speech)**|**Approved meaning/**<br>**ALTERNATIVES**|**STE EXAMPLE**|**Non-STE example**|
|---|---|---|---|
|**unplug (v) — UNNAPPROVED**|DISCONNECT (v)|DISCONNECT THE<br>SOLDERING IRON.|Unplug the soldering<br>iron.|
|||PLUG (TN)|REMOVE THE PLUG<br>FROM THE FUEL LINE.|Unplug the fuel line.|
|**unprotected (adj) — UNNAPPROVED**|PROTECTION (n)|WHEN YOU REMOVE<br>THE COVER, THE<br>CONTACTS HAVE NO<br>PROTECTION.|When you remove the<br>cover, the contacts are<br>unprotected.|
|**unreel (v) — UNNAPPROVED**|UNWIND (v)|UNWIND THE HOSE.|Unreel the hose.|
|**unrestricted (adj) — UNNAPPROVED**|FREE (adj)|THE BALL BEARING<br>MUST BE FREE TO<br>TURN.|Ball bearing rotation<br>must be unrestricted.|
|**unsafe (adj) — UNNAPPROVED**|DANGEROUS (adj)|IN THESE<br>CONDITIONS, IT IS<br>DANGEROUS TO<br>REMOVE THE<br>CARTRIDGES FROM<br>THE FIRE<br>EXTINGUISHER<br>BOTTLE.|In these conditions, it is<br>unsafe to remove the<br>cartridges from the fire<br>extinguisher bottle.|
|**UNSATISFAC-**<br>**TORILY (adv)**|In an unsatisfactory<br>manner|IF THE ELEVATORS<br>OPERATE<br>UNSATISFACTORILY,<br>MOVE THE CONTROL<br>COLUMN.||
|**UNSATISFAC-**<br>**TORY (adj)**|Not satisfactory|IF THE CONDITION OF<br>THE FILTERS IS<br>UNSATISFACTORY,<br>REPLACE THEM.||
|**unscrew (v) — UNNAPPROVED**|LOOSEN (v)|LOOSEN THE CAPTIVE<br>BOLTS.|Unscrew the captive<br>bolts.|
|||TURN (v)|TURN THE END<br>FITTING TO ALIGN THE<br>RIGGING HOLES.|<br>Unscrew the end fitting<br>to align the rigging holes.|
|||REMOVE (v)|REMOVE THE NUTS.|Unscrew the nuts.|
|**UNSERVICEABLE**<br>**(adj)**|Not fit for its purpose|REPLACE THE<br>UNSERVICEABLE<br>BUSHINGS.||
|**unstable (adj) — UNNAPPROVED**|NOT STABLE|IF THE SURFACE IS<br>NOT STABLE, AN<br>ACCIDENT CAN<br>OCCUR.|If the surface is unstable,<br>an accident can occur.|

**Issue 9 2025-01-15**

**Part 2 - Dictionary**
